383 lines
10 KiB
C
383 lines
10 KiB
C
/* Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/mfd/core.h>
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#include <linux/msm_ssbi.h>
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#include <linux/mfd/pmic8901.h>
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#include <linux/mfd/pm8xxx/core.h>
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#include <linux/module.h>
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/* PMIC8901 Revision */
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#define PM8901_REG_REV 0x002
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#define PM8901_VERSION_MASK 0xF0
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#define PM8901_REVISION_MASK 0x0F
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#define PM8901_VERSION_VALUE 0xF0
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#define REG_IRQ_BASE 0xD5
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#define REG_MPP_BASE 0x27
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#define REG_TEMP_ALRM_CTRL 0x23
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#define REG_TEMP_ALRM_PWM 0x24
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#define SINGLE_IRQ_RESOURCE(_name, _irq) \
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{ \
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.name = _name, \
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.start = _irq, \
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.end = _irq, \
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.flags = IORESOURCE_IRQ, \
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}
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struct pm8901_chip {
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struct pm8901_platform_data pdata;
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struct device *dev;
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struct pm_irq_chip *irq_chip;
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struct mfd_cell *mfd_regulators;
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u8 revision;
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};
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static int pm8901_readb(const struct device *dev, u16 addr, u8 *val)
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{
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const struct pm8xxx_drvdata *pm8901_drvdata = dev_get_drvdata(dev);
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const struct pm8901_chip *pmic = pm8901_drvdata->pm_chip_data;
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return msm_ssbi_read(pmic->dev->parent, addr, val, 1);
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}
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static int pm8901_writeb(const struct device *dev, u16 addr, u8 val)
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{
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const struct pm8xxx_drvdata *pm8901_drvdata = dev_get_drvdata(dev);
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const struct pm8901_chip *pmic = pm8901_drvdata->pm_chip_data;
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return msm_ssbi_write(pmic->dev->parent, addr, &val, 1);
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}
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static int pm8901_read_buf(const struct device *dev, u16 addr, u8 *buf,
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int cnt)
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{
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const struct pm8xxx_drvdata *pm8901_drvdata = dev_get_drvdata(dev);
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const struct pm8901_chip *pmic = pm8901_drvdata->pm_chip_data;
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return msm_ssbi_read(pmic->dev->parent, addr, buf, cnt);
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}
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static int pm8901_write_buf(const struct device *dev, u16 addr, u8 *buf,
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int cnt)
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{
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const struct pm8xxx_drvdata *pm8901_drvdata = dev_get_drvdata(dev);
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const struct pm8901_chip *pmic = pm8901_drvdata->pm_chip_data;
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return msm_ssbi_write(pmic->dev->parent, addr, buf, cnt);
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}
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static int pm8901_read_irq_stat(const struct device *dev, int irq)
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{
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const struct pm8xxx_drvdata *pm8901_drvdata = dev_get_drvdata(dev);
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const struct pm8901_chip *pmic = pm8901_drvdata->pm_chip_data;
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return pm8xxx_get_irq_stat(pmic->irq_chip, irq);
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return 0;
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}
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static enum pm8xxx_version pm8901_get_version(const struct device *dev)
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{
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const struct pm8xxx_drvdata *pm8901_drvdata = dev_get_drvdata(dev);
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const struct pm8901_chip *pmic = pm8901_drvdata->pm_chip_data;
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enum pm8xxx_version version = -ENODEV;
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if ((pmic->revision & PM8901_VERSION_MASK) == PM8901_VERSION_VALUE)
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version = PM8XXX_VERSION_8901;
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return version;
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}
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static int pm8901_get_revision(const struct device *dev)
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{
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const struct pm8xxx_drvdata *pm8901_drvdata = dev_get_drvdata(dev);
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const struct pm8901_chip *pmic = pm8901_drvdata->pm_chip_data;
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return pmic->revision & PM8901_REVISION_MASK;
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}
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static struct pm8xxx_drvdata pm8901_drvdata = {
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.pmic_readb = pm8901_readb,
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.pmic_writeb = pm8901_writeb,
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.pmic_read_buf = pm8901_read_buf,
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.pmic_write_buf = pm8901_write_buf,
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.pmic_read_irq_stat = pm8901_read_irq_stat,
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.pmic_get_version = pm8901_get_version,
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.pmic_get_revision = pm8901_get_revision,
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};
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static struct mfd_cell misc_cell = {
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.name = PM8XXX_MISC_DEV_NAME,
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.id = 1,
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};
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static struct mfd_cell debugfs_cell = {
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.name = "pm8xxx-debug",
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.id = 1,
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.platform_data = "pm8901-dbg",
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.pdata_size = sizeof("pm8901-dbg"),
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};
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static const struct resource thermal_alarm_cell_resources[] = {
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SINGLE_IRQ_RESOURCE("pm8901_tempstat_irq", PM8901_TEMPSTAT_IRQ),
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SINGLE_IRQ_RESOURCE("pm8901_overtemp_irq", PM8901_OVERTEMP_IRQ),
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};
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static struct pm8xxx_tm_core_data thermal_alarm_cdata = {
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.adc_type = PM8XXX_TM_ADC_NONE,
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.reg_addr_temp_alarm_ctrl = REG_TEMP_ALRM_CTRL,
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.reg_addr_temp_alarm_pwm = REG_TEMP_ALRM_PWM,
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.tm_name = "pm8901_tz",
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.irq_name_temp_stat = "pm8901_tempstat_irq",
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.irq_name_over_temp = "pm8901_overtemp_irq",
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};
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static struct mfd_cell thermal_alarm_cell = {
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.name = PM8XXX_TM_DEV_NAME,
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.id = 1,
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.resources = thermal_alarm_cell_resources,
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.num_resources = ARRAY_SIZE(thermal_alarm_cell_resources),
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.platform_data = &thermal_alarm_cdata,
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.pdata_size = sizeof(struct pm8xxx_tm_core_data),
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};
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static const struct resource mpp_cell_resources[] = {
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{
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.start = PM8901_IRQ_BLOCK_BIT(PM8901_MPP_BLOCK_START, 0),
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.end = PM8901_IRQ_BLOCK_BIT(PM8901_MPP_BLOCK_START, 0)
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+ PM8901_MPPS - 1,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct mfd_cell mpp_cell = {
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.name = PM8XXX_MPP_DEV_NAME,
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.id = 1,
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.resources = mpp_cell_resources,
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.num_resources = ARRAY_SIZE(mpp_cell_resources),
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};
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static int __devinit
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pm8901_add_subdevices(const struct pm8901_platform_data *pdata,
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struct pm8901_chip *pmic)
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{
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int rc = 0, irq_base = 0, i;
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struct pm_irq_chip *irq_chip;
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static struct mfd_cell *mfd_regulators;
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if (pdata->irq_pdata) {
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pdata->irq_pdata->irq_cdata.nirqs = PM8901_NR_IRQS;
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pdata->irq_pdata->irq_cdata.base_addr = REG_IRQ_BASE;
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irq_base = pdata->irq_pdata->irq_base;
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irq_chip = pm8xxx_irq_init(pmic->dev, pdata->irq_pdata);
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if (IS_ERR(irq_chip)) {
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pr_err("Failed to init interrupts ret=%ld\n",
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PTR_ERR(irq_chip));
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return PTR_ERR(irq_chip);
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}
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pmic->irq_chip = irq_chip;
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}
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if (pdata->mpp_pdata) {
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pdata->mpp_pdata->core_data.nmpps = PM8901_MPPS;
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pdata->mpp_pdata->core_data.base_addr = REG_MPP_BASE;
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mpp_cell.platform_data = pdata->mpp_pdata;
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mpp_cell.pdata_size = sizeof(struct pm8xxx_mpp_platform_data);
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rc = mfd_add_devices(pmic->dev, 0, &mpp_cell, 1, NULL,
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irq_base);
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if (rc) {
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pr_err("Failed to add mpp subdevice ret=%d\n", rc);
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goto bail;
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}
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}
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if (pdata->num_regulators > 0 && pdata->regulator_pdatas) {
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mfd_regulators = kzalloc(sizeof(struct mfd_cell)
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* (pdata->num_regulators), GFP_KERNEL);
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if (!mfd_regulators) {
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pr_err("Cannot allocate %d bytes for pm8901 regulator "
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"mfd cells\n", sizeof(struct mfd_cell)
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* (pdata->num_regulators));
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rc = -ENOMEM;
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goto bail;
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}
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for (i = 0; i < pdata->num_regulators; i++) {
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mfd_regulators[i].name = "pm8901-regulator";
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mfd_regulators[i].id = pdata->regulator_pdatas[i].id;
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mfd_regulators[i].platform_data =
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&(pdata->regulator_pdatas[i]);
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mfd_regulators[i].pdata_size =
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sizeof(struct pm8901_vreg_pdata);
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}
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rc = mfd_add_devices(pmic->dev, 0, mfd_regulators,
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pdata->num_regulators, NULL, irq_base);
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if (rc) {
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pr_err("Failed to add regulator subdevices ret=%d\n",
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rc);
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kfree(mfd_regulators);
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goto bail;
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}
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pmic->mfd_regulators = mfd_regulators;
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}
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rc = mfd_add_devices(pmic->dev, 0, &thermal_alarm_cell, 1, NULL,
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irq_base);
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if (rc) {
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pr_err("Failed to add thermal alarm subdevice ret=%d\n",
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rc);
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goto bail;
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}
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rc = mfd_add_devices(pmic->dev, 0, &debugfs_cell, 1, NULL, irq_base);
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if (rc) {
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pr_err("Failed to add debugfs subdevice ret=%d\n", rc);
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goto bail;
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}
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if (pdata->misc_pdata) {
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misc_cell.platform_data = pdata->misc_pdata;
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misc_cell.pdata_size = sizeof(struct pm8xxx_misc_platform_data);
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rc = mfd_add_devices(pmic->dev, 0, &misc_cell, 1, NULL,
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irq_base);
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if (rc) {
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pr_err("Failed to add misc subdevice ret=%d\n", rc);
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goto bail;
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}
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}
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return rc;
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bail:
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if (pmic->irq_chip) {
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pm8xxx_irq_exit(pmic->irq_chip);
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pmic->irq_chip = NULL;
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}
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return rc;
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}
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static const char * const pm8901_rev_names[] = {
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[PM8XXX_REVISION_8901_TEST] = "test",
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[PM8XXX_REVISION_8901_1p0] = "1.0",
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[PM8XXX_REVISION_8901_1p1] = "1.1",
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[PM8XXX_REVISION_8901_2p0] = "2.0",
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[PM8XXX_REVISION_8901_2p1] = "2.1",
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[PM8XXX_REVISION_8901_2p2] = "2.2",
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[PM8XXX_REVISION_8901_2p3] = "2.3",
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};
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static int __devinit pm8901_probe(struct platform_device *pdev)
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{
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int rc;
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struct pm8901_platform_data *pdata = pdev->dev.platform_data;
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const char *revision_name = "unknown";
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struct pm8901_chip *pmic;
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int revision;
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if (pdata == NULL) {
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pr_err("%s: No platform_data or IRQ.\n", __func__);
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return -ENODEV;
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}
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pmic = kzalloc(sizeof *pmic, GFP_KERNEL);
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if (pmic == NULL) {
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pr_err("%s: kzalloc() failed.\n", __func__);
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return -ENOMEM;
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}
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pmic->dev = &pdev->dev;
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pm8901_drvdata.pm_chip_data = pmic;
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platform_set_drvdata(pdev, &pm8901_drvdata);
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/* Read PMIC chip revision */
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rc = pm8901_readb(pmic->dev, PM8901_REG_REV, &pmic->revision);
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if (rc)
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pr_err("%s: Failed reading version register rc=%d.\n",
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__func__, rc);
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pr_info("%s: PMIC revision reg: %02X\n", __func__, pmic->revision);
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revision = pm8xxx_get_revision(pmic->dev);
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if (revision >= 0 && revision < ARRAY_SIZE(pm8901_rev_names))
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revision_name = pm8901_rev_names[revision];
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pr_info("%s: PMIC version: PM8901 rev %s\n", __func__, revision_name);
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(void) memcpy((void *)&pmic->pdata, (const void *)pdata,
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sizeof(pmic->pdata));
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rc = pm8901_add_subdevices(pdata, pmic);
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if (rc) {
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pr_err("Cannot add subdevices rc=%d\n", rc);
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goto err;
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}
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return 0;
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err:
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platform_set_drvdata(pdev, NULL);
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kfree(pmic);
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return rc;
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}
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static int __devexit pm8901_remove(struct platform_device *pdev)
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{
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struct pm8xxx_drvdata *drvdata;
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struct pm8901_chip *pmic = NULL;
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drvdata = platform_get_drvdata(pdev);
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if (drvdata)
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pmic = drvdata->pm_chip_data;
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if (pmic) {
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if (pmic->dev)
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mfd_remove_devices(pmic->dev);
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if (pmic->irq_chip)
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pm8xxx_irq_exit(pmic->irq_chip);
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kfree(pmic->mfd_regulators);
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kfree(pmic);
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}
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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static struct platform_driver pm8901_driver = {
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.probe = pm8901_probe,
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.remove = __devexit_p(pm8901_remove),
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.driver = {
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.name = "pm8901-core",
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.owner = THIS_MODULE,
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},
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};
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static int __init pm8901_init(void)
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{
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return platform_driver_register(&pm8901_driver);
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}
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postcore_initcall(pm8901_init);
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static void __exit pm8901_exit(void)
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{
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platform_driver_unregister(&pm8901_driver);
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}
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module_exit(pm8901_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("PMIC8901 core driver");
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MODULE_VERSION("1.0");
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MODULE_ALIAS("platform:pmic8901-core");
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