527 lines
12 KiB
C
527 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* DA9150 Core MFD Driver
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*
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* Copyright (c) 2014 Dialog Semiconductor
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*
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* Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/da9150/core.h>
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#include <linux/mfd/da9150/registers.h>
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/* Raw device access, used for QIF */
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static int da9150_i2c_read_device(struct i2c_client *client, u8 addr, int count,
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u8 *buf)
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{
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struct i2c_msg xfer;
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int ret;
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/*
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* Read is split into two transfers as device expects STOP/START rather
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* than repeated start to carry out this kind of access.
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*/
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/* Write address */
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xfer.addr = client->addr;
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xfer.flags = 0;
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xfer.len = 1;
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xfer.buf = &addr;
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ret = i2c_transfer(client->adapter, &xfer, 1);
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if (ret != 1) {
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if (ret < 0)
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return ret;
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else
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return -EIO;
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}
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/* Read data */
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xfer.addr = client->addr;
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xfer.flags = I2C_M_RD;
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xfer.len = count;
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xfer.buf = buf;
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ret = i2c_transfer(client->adapter, &xfer, 1);
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if (ret == 1)
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return 0;
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else if (ret < 0)
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return ret;
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else
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return -EIO;
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}
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static int da9150_i2c_write_device(struct i2c_client *client, u8 addr,
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int count, const u8 *buf)
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{
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struct i2c_msg xfer;
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u8 *reg_data;
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int ret;
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reg_data = kzalloc(1 + count, GFP_KERNEL);
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if (!reg_data)
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return -ENOMEM;
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reg_data[0] = addr;
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memcpy(®_data[1], buf, count);
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/* Write address & data */
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xfer.addr = client->addr;
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xfer.flags = 0;
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xfer.len = 1 + count;
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xfer.buf = reg_data;
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ret = i2c_transfer(client->adapter, &xfer, 1);
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kfree(reg_data);
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if (ret == 1)
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return 0;
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else if (ret < 0)
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return ret;
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else
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return -EIO;
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}
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static bool da9150_volatile_reg(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case DA9150_PAGE_CON:
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case DA9150_STATUS_A:
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case DA9150_STATUS_B:
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case DA9150_STATUS_C:
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case DA9150_STATUS_D:
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case DA9150_STATUS_E:
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case DA9150_STATUS_F:
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case DA9150_STATUS_G:
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case DA9150_STATUS_H:
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case DA9150_STATUS_I:
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case DA9150_STATUS_J:
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case DA9150_STATUS_K:
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case DA9150_STATUS_L:
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case DA9150_STATUS_N:
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case DA9150_FAULT_LOG_A:
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case DA9150_FAULT_LOG_B:
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case DA9150_EVENT_E:
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case DA9150_EVENT_F:
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case DA9150_EVENT_G:
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case DA9150_EVENT_H:
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case DA9150_CONTROL_B:
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case DA9150_CONTROL_C:
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case DA9150_GPADC_MAN:
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case DA9150_GPADC_RES_A:
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case DA9150_GPADC_RES_B:
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case DA9150_ADETVB_CFG_C:
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case DA9150_ADETD_STAT:
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case DA9150_ADET_CMPSTAT:
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case DA9150_ADET_CTRL_A:
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case DA9150_PPR_TCTR_B:
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case DA9150_COREBTLD_STAT_A:
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case DA9150_CORE_DATA_A:
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case DA9150_CORE_DATA_B:
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case DA9150_CORE_DATA_C:
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case DA9150_CORE_DATA_D:
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case DA9150_CORE2WIRE_STAT_A:
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case DA9150_FW_CTRL_C:
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case DA9150_FG_CTRL_B:
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case DA9150_FW_CTRL_B:
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case DA9150_GPADC_CMAN:
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case DA9150_GPADC_CRES_A:
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case DA9150_GPADC_CRES_B:
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case DA9150_CC_ICHG_RES_A:
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case DA9150_CC_ICHG_RES_B:
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case DA9150_CC_IAVG_RES_A:
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case DA9150_CC_IAVG_RES_B:
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case DA9150_TAUX_CTRL_A:
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case DA9150_TAUX_VALUE_H:
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case DA9150_TAUX_VALUE_L:
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case DA9150_TBAT_RES_A:
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case DA9150_TBAT_RES_B:
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return true;
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default:
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return false;
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}
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}
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static const struct regmap_range_cfg da9150_range_cfg[] = {
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{
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.range_min = DA9150_PAGE_CON,
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.range_max = DA9150_TBAT_RES_B,
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.selector_reg = DA9150_PAGE_CON,
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.selector_mask = DA9150_I2C_PAGE_MASK,
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.selector_shift = DA9150_I2C_PAGE_SHIFT,
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.window_start = 0,
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.window_len = 256,
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},
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};
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static const struct regmap_config da9150_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.ranges = da9150_range_cfg,
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.num_ranges = ARRAY_SIZE(da9150_range_cfg),
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.max_register = DA9150_TBAT_RES_B,
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.cache_type = REGCACHE_RBTREE,
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.volatile_reg = da9150_volatile_reg,
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};
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void da9150_read_qif(struct da9150 *da9150, u8 addr, int count, u8 *buf)
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{
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int ret;
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ret = da9150_i2c_read_device(da9150->core_qif, addr, count, buf);
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if (ret < 0)
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dev_err(da9150->dev, "Failed to read from QIF 0x%x: %d\n",
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addr, ret);
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}
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EXPORT_SYMBOL_GPL(da9150_read_qif);
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void da9150_write_qif(struct da9150 *da9150, u8 addr, int count, const u8 *buf)
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{
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int ret;
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ret = da9150_i2c_write_device(da9150->core_qif, addr, count, buf);
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if (ret < 0)
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dev_err(da9150->dev, "Failed to write to QIF 0x%x: %d\n",
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addr, ret);
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}
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EXPORT_SYMBOL_GPL(da9150_write_qif);
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u8 da9150_reg_read(struct da9150 *da9150, u16 reg)
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{
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int val, ret;
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ret = regmap_read(da9150->regmap, reg, &val);
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if (ret)
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dev_err(da9150->dev, "Failed to read from reg 0x%x: %d\n",
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reg, ret);
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return (u8) val;
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}
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EXPORT_SYMBOL_GPL(da9150_reg_read);
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void da9150_reg_write(struct da9150 *da9150, u16 reg, u8 val)
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{
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int ret;
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ret = regmap_write(da9150->regmap, reg, val);
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if (ret)
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dev_err(da9150->dev, "Failed to write to reg 0x%x: %d\n",
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reg, ret);
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}
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EXPORT_SYMBOL_GPL(da9150_reg_write);
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void da9150_set_bits(struct da9150 *da9150, u16 reg, u8 mask, u8 val)
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{
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int ret;
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ret = regmap_update_bits(da9150->regmap, reg, mask, val);
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if (ret)
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dev_err(da9150->dev, "Failed to set bits in reg 0x%x: %d\n",
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reg, ret);
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}
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EXPORT_SYMBOL_GPL(da9150_set_bits);
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void da9150_bulk_read(struct da9150 *da9150, u16 reg, int count, u8 *buf)
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{
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int ret;
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ret = regmap_bulk_read(da9150->regmap, reg, buf, count);
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if (ret)
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dev_err(da9150->dev, "Failed to bulk read from reg 0x%x: %d\n",
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reg, ret);
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}
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EXPORT_SYMBOL_GPL(da9150_bulk_read);
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void da9150_bulk_write(struct da9150 *da9150, u16 reg, int count, const u8 *buf)
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{
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int ret;
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ret = regmap_raw_write(da9150->regmap, reg, buf, count);
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if (ret)
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dev_err(da9150->dev, "Failed to bulk write to reg 0x%x %d\n",
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reg, ret);
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}
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EXPORT_SYMBOL_GPL(da9150_bulk_write);
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static const struct regmap_irq da9150_irqs[] = {
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[DA9150_IRQ_VBUS] = {
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.reg_offset = 0,
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.mask = DA9150_E_VBUS_MASK,
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},
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[DA9150_IRQ_CHG] = {
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.reg_offset = 0,
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.mask = DA9150_E_CHG_MASK,
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},
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[DA9150_IRQ_TCLASS] = {
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.reg_offset = 0,
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.mask = DA9150_E_TCLASS_MASK,
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},
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[DA9150_IRQ_TJUNC] = {
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.reg_offset = 0,
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.mask = DA9150_E_TJUNC_MASK,
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},
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[DA9150_IRQ_VFAULT] = {
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.reg_offset = 0,
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.mask = DA9150_E_VFAULT_MASK,
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},
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[DA9150_IRQ_CONF] = {
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.reg_offset = 1,
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.mask = DA9150_E_CONF_MASK,
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},
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[DA9150_IRQ_DAT] = {
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.reg_offset = 1,
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.mask = DA9150_E_DAT_MASK,
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},
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[DA9150_IRQ_DTYPE] = {
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.reg_offset = 1,
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.mask = DA9150_E_DTYPE_MASK,
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},
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[DA9150_IRQ_ID] = {
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.reg_offset = 1,
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.mask = DA9150_E_ID_MASK,
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},
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[DA9150_IRQ_ADP] = {
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.reg_offset = 1,
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.mask = DA9150_E_ADP_MASK,
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},
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[DA9150_IRQ_SESS_END] = {
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.reg_offset = 1,
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.mask = DA9150_E_SESS_END_MASK,
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},
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[DA9150_IRQ_SESS_VLD] = {
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.reg_offset = 1,
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.mask = DA9150_E_SESS_VLD_MASK,
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},
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[DA9150_IRQ_FG] = {
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.reg_offset = 2,
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.mask = DA9150_E_FG_MASK,
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},
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[DA9150_IRQ_GP] = {
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.reg_offset = 2,
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.mask = DA9150_E_GP_MASK,
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},
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[DA9150_IRQ_TBAT] = {
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.reg_offset = 2,
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.mask = DA9150_E_TBAT_MASK,
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},
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[DA9150_IRQ_GPIOA] = {
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.reg_offset = 2,
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.mask = DA9150_E_GPIOA_MASK,
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},
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[DA9150_IRQ_GPIOB] = {
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.reg_offset = 2,
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.mask = DA9150_E_GPIOB_MASK,
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},
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[DA9150_IRQ_GPIOC] = {
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.reg_offset = 2,
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.mask = DA9150_E_GPIOC_MASK,
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},
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[DA9150_IRQ_GPIOD] = {
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.reg_offset = 2,
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.mask = DA9150_E_GPIOD_MASK,
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},
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[DA9150_IRQ_GPADC] = {
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.reg_offset = 2,
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.mask = DA9150_E_GPADC_MASK,
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},
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[DA9150_IRQ_WKUP] = {
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.reg_offset = 3,
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.mask = DA9150_E_WKUP_MASK,
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},
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};
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static const struct regmap_irq_chip da9150_regmap_irq_chip = {
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.name = "da9150_irq",
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.status_base = DA9150_EVENT_E,
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.mask_base = DA9150_IRQ_MASK_E,
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.ack_base = DA9150_EVENT_E,
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.num_regs = DA9150_NUM_IRQ_REGS,
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.irqs = da9150_irqs,
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.num_irqs = ARRAY_SIZE(da9150_irqs),
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};
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static struct resource da9150_gpadc_resources[] = {
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DEFINE_RES_IRQ_NAMED(DA9150_IRQ_GPADC, "GPADC"),
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};
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static struct resource da9150_charger_resources[] = {
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DEFINE_RES_IRQ_NAMED(DA9150_IRQ_CHG, "CHG_STATUS"),
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DEFINE_RES_IRQ_NAMED(DA9150_IRQ_TJUNC, "CHG_TJUNC"),
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DEFINE_RES_IRQ_NAMED(DA9150_IRQ_VFAULT, "CHG_VFAULT"),
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DEFINE_RES_IRQ_NAMED(DA9150_IRQ_VBUS, "CHG_VBUS"),
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};
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static struct resource da9150_fg_resources[] = {
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DEFINE_RES_IRQ_NAMED(DA9150_IRQ_FG, "FG"),
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};
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enum da9150_dev_idx {
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DA9150_GPADC_IDX = 0,
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DA9150_CHARGER_IDX,
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DA9150_FG_IDX,
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};
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static struct mfd_cell da9150_devs[] = {
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[DA9150_GPADC_IDX] = {
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.name = "da9150-gpadc",
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.of_compatible = "dlg,da9150-gpadc",
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.resources = da9150_gpadc_resources,
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.num_resources = ARRAY_SIZE(da9150_gpadc_resources),
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},
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[DA9150_CHARGER_IDX] = {
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.name = "da9150-charger",
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.of_compatible = "dlg,da9150-charger",
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.resources = da9150_charger_resources,
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.num_resources = ARRAY_SIZE(da9150_charger_resources),
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},
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[DA9150_FG_IDX] = {
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.name = "da9150-fuel-gauge",
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.of_compatible = "dlg,da9150-fuel-gauge",
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.resources = da9150_fg_resources,
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.num_resources = ARRAY_SIZE(da9150_fg_resources),
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},
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};
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static int da9150_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct da9150 *da9150;
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struct da9150_pdata *pdata = dev_get_platdata(&client->dev);
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int qif_addr;
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int ret;
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da9150 = devm_kzalloc(&client->dev, sizeof(*da9150), GFP_KERNEL);
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if (!da9150)
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return -ENOMEM;
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da9150->dev = &client->dev;
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da9150->irq = client->irq;
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i2c_set_clientdata(client, da9150);
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da9150->regmap = devm_regmap_init_i2c(client, &da9150_regmap_config);
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if (IS_ERR(da9150->regmap)) {
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ret = PTR_ERR(da9150->regmap);
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dev_err(da9150->dev, "Failed to allocate register map: %d\n",
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ret);
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return ret;
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}
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/* Setup secondary I2C interface for QIF access */
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qif_addr = da9150_reg_read(da9150, DA9150_CORE2WIRE_CTRL_A);
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qif_addr = (qif_addr & DA9150_CORE_BASE_ADDR_MASK) >> 1;
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qif_addr |= DA9150_QIF_I2C_ADDR_LSB;
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da9150->core_qif = i2c_new_dummy(client->adapter, qif_addr);
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if (!da9150->core_qif) {
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dev_err(da9150->dev, "Failed to attach QIF client\n");
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return -ENODEV;
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}
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i2c_set_clientdata(da9150->core_qif, da9150);
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if (pdata) {
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da9150->irq_base = pdata->irq_base;
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da9150_devs[DA9150_FG_IDX].platform_data = pdata->fg_pdata;
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da9150_devs[DA9150_FG_IDX].pdata_size =
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sizeof(struct da9150_fg_pdata);
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} else {
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da9150->irq_base = -1;
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}
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ret = regmap_add_irq_chip(da9150->regmap, da9150->irq,
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IRQF_TRIGGER_LOW | IRQF_ONESHOT,
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da9150->irq_base, &da9150_regmap_irq_chip,
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&da9150->regmap_irq_data);
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if (ret) {
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dev_err(da9150->dev, "Failed to add regmap irq chip: %d\n",
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ret);
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goto regmap_irq_fail;
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}
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da9150->irq_base = regmap_irq_chip_get_base(da9150->regmap_irq_data);
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enable_irq_wake(da9150->irq);
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ret = mfd_add_devices(da9150->dev, -1, da9150_devs,
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ARRAY_SIZE(da9150_devs), NULL,
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da9150->irq_base, NULL);
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if (ret) {
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dev_err(da9150->dev, "Failed to add child devices: %d\n", ret);
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goto mfd_fail;
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}
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return 0;
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mfd_fail:
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regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data);
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regmap_irq_fail:
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i2c_unregister_device(da9150->core_qif);
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return ret;
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}
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static int da9150_remove(struct i2c_client *client)
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{
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struct da9150 *da9150 = i2c_get_clientdata(client);
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regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data);
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mfd_remove_devices(da9150->dev);
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i2c_unregister_device(da9150->core_qif);
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return 0;
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}
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static void da9150_shutdown(struct i2c_client *client)
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{
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struct da9150 *da9150 = i2c_get_clientdata(client);
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/* Make sure we have a wakup source for the device */
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da9150_set_bits(da9150, DA9150_CONFIG_D,
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DA9150_WKUP_PM_EN_MASK,
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DA9150_WKUP_PM_EN_MASK);
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|
|
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/* Set device to DISABLED mode */
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da9150_set_bits(da9150, DA9150_CONTROL_C,
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DA9150_DISABLE_MASK, DA9150_DISABLE_MASK);
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}
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static const struct i2c_device_id da9150_i2c_id[] = {
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{ "da9150", },
|
|
{ }
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};
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MODULE_DEVICE_TABLE(i2c, da9150_i2c_id);
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|
|
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static const struct of_device_id da9150_of_match[] = {
|
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{ .compatible = "dlg,da9150", },
|
|
{ }
|
|
};
|
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MODULE_DEVICE_TABLE(of, da9150_of_match);
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|
|
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static struct i2c_driver da9150_driver = {
|
|
.driver = {
|
|
.name = "da9150",
|
|
.of_match_table = of_match_ptr(da9150_of_match),
|
|
},
|
|
.probe = da9150_probe,
|
|
.remove = da9150_remove,
|
|
.shutdown = da9150_shutdown,
|
|
.id_table = da9150_i2c_id,
|
|
};
|
|
|
|
module_i2c_driver(da9150_driver);
|
|
|
|
MODULE_DESCRIPTION("MFD Core Driver for DA9150");
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MODULE_AUTHOR("Adam Thomson <Adam.Thomson.Opensource@diasemi.com>");
|
|
MODULE_LICENSE("GPL");
|