+++ /dev/null
-/*
- * max8997-muic.c - MAX8997 muic driver for the Maxim 8997
- *
- * Copyright (C) 2011 Samsung Electrnoics
- * Donggeun Kim <dg77.kim@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/err.h>
-#include <linux/platform_device.h>
-#include <linux/kobject.h>
-#include <linux/mfd/max8997.h>
-#include <linux/mfd/max8997-private.h>
-
-/* MAX8997-MUIC STATUS1 register */
-#define STATUS1_ADC_SHIFT 0
-#define STATUS1_ADCLOW_SHIFT 5
-#define STATUS1_ADCERR_SHIFT 6
-#define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT)
-#define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT)
-#define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT)
-
-/* MAX8997-MUIC STATUS2 register */
-#define STATUS2_CHGTYP_SHIFT 0
-#define STATUS2_CHGDETRUN_SHIFT 3
-#define STATUS2_DCDTMR_SHIFT 4
-#define STATUS2_DBCHG_SHIFT 5
-#define STATUS2_VBVOLT_SHIFT 6
-#define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT)
-#define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT)
-#define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT)
-#define STATUS2_DBCHG_MASK (0x1 << STATUS2_DBCHG_SHIFT)
-#define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT)
-
-/* MAX8997-MUIC STATUS3 register */
-#define STATUS3_OVP_SHIFT 2
-#define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT)
-
-/* MAX8997-MUIC CONTROL1 register */
-#define COMN1SW_SHIFT 0
-#define COMP2SW_SHIFT 3
-#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
-#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
-#define SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
-
-#define MAX8997_SW_USB ((1 << COMP2SW_SHIFT) | (1 << COMN1SW_SHIFT))
-#define MAX8997_SW_AUDIO ((2 << COMP2SW_SHIFT) | (2 << COMN1SW_SHIFT))
-#define MAX8997_SW_UART ((3 << COMP2SW_SHIFT) | (3 << COMN1SW_SHIFT))
-#define MAX8997_SW_OPEN ((0 << COMP2SW_SHIFT) | (0 << COMN1SW_SHIFT))
-
-#define MAX8997_ADC_GROUND 0x00
-#define MAX8997_ADC_MHL 0x01
-#define MAX8997_ADC_JIG_USB_1 0x18
-#define MAX8997_ADC_JIG_USB_2 0x19
-#define MAX8997_ADC_DESKDOCK 0x1a
-#define MAX8997_ADC_JIG_UART 0x1c
-#define MAX8997_ADC_CARDOCK 0x1d
-#define MAX8997_ADC_OPEN 0x1f
-
-struct max8997_muic_irq {
- unsigned int irq;
- const char *name;
-};
-
-static struct max8997_muic_irq muic_irqs[] = {
- { MAX8997_MUICIRQ_ADCError, "muic-ADC_error" },
- { MAX8997_MUICIRQ_ADCLow, "muic-ADC_low" },
- { MAX8997_MUICIRQ_ADC, "muic-ADC" },
- { MAX8997_MUICIRQ_VBVolt, "muic-VB_voltage" },
- { MAX8997_MUICIRQ_DBChg, "muic-DB_charger" },
- { MAX8997_MUICIRQ_DCDTmr, "muic-DCD_timer" },
- { MAX8997_MUICIRQ_ChgDetRun, "muic-CDR_status" },
- { MAX8997_MUICIRQ_ChgTyp, "muic-charger_type" },
- { MAX8997_MUICIRQ_OVP, "muic-over_voltage" },
-};
-
-struct max8997_muic_info {
- struct device *dev;
- struct max8997_dev *iodev;
- struct i2c_client *muic;
- struct max8997_muic_platform_data *muic_pdata;
-
- int irq;
- struct work_struct irq_work;
-
- enum max8997_muic_charger_type pre_charger_type;
- int pre_adc;
-
- struct mutex mutex;
-};
-
-static int max8997_muic_handle_usb(struct max8997_muic_info *info,
- enum max8997_muic_usb_type usb_type, bool attached)
-{
- struct max8997_muic_platform_data *mdata = info->muic_pdata;
- int ret = 0;
-
- if (usb_type == MAX8997_USB_HOST) {
- /* switch to USB */
- ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
- attached ? MAX8997_SW_USB : MAX8997_SW_OPEN,
- SW_MASK);
- if (ret) {
- dev_err(info->dev, "failed to update muic register\n");
- goto out;
- }
- }
-
- if (mdata->usb_callback)
- mdata->usb_callback(usb_type, attached);
-out:
- return ret;
-}
-
-static void max8997_muic_handle_mhl(struct max8997_muic_info *info,
- bool attached)
-{
- struct max8997_muic_platform_data *mdata = info->muic_pdata;
-
- if (mdata->mhl_callback)
- mdata->mhl_callback(attached);
-}
-
-static int max8997_muic_handle_dock(struct max8997_muic_info *info,
- int adc, bool attached)
-{
- struct max8997_muic_platform_data *mdata = info->muic_pdata;
- int ret = 0;
-
- /* switch to AUDIO */
- ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
- attached ? MAX8997_SW_AUDIO : MAX8997_SW_OPEN,
- SW_MASK);
- if (ret) {
- dev_err(info->dev, "failed to update muic register\n");
- goto out;
- }
-
- switch (adc) {
- case MAX8997_ADC_DESKDOCK:
- if (mdata->deskdock_callback)
- mdata->deskdock_callback(attached);
- break;
- case MAX8997_ADC_CARDOCK:
- if (mdata->cardock_callback)
- mdata->cardock_callback(attached);
- break;
- default:
- break;
- }
-out:
- return ret;
-}
-
-static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
- bool attached)
-{
- struct max8997_muic_platform_data *mdata = info->muic_pdata;
- int ret = 0;
-
- /* switch to UART */
- ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
- attached ? MAX8997_SW_UART : MAX8997_SW_OPEN,
- SW_MASK);
- if (ret) {
- dev_err(info->dev, "failed to update muic register\n");
- goto out;
- }
-
- if (mdata->uart_callback)
- mdata->uart_callback(attached);
-out:
- return ret;
-}
-
-static int max8997_muic_handle_adc_detach(struct max8997_muic_info *info)
-{
- int ret = 0;
-
- switch (info->pre_adc) {
- case MAX8997_ADC_GROUND:
- ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
- break;
- case MAX8997_ADC_MHL:
- max8997_muic_handle_mhl(info, false);
- break;
- case MAX8997_ADC_JIG_USB_1:
- case MAX8997_ADC_JIG_USB_2:
- ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, false);
- break;
- case MAX8997_ADC_DESKDOCK:
- case MAX8997_ADC_CARDOCK:
- ret = max8997_muic_handle_dock(info, info->pre_adc, false);
- break;
- case MAX8997_ADC_JIG_UART:
- ret = max8997_muic_handle_jig_uart(info, false);
- break;
- default:
- break;
- }
-
- return ret;
-}
-
-static int max8997_muic_handle_adc(struct max8997_muic_info *info, int adc)
-{
- int ret = 0;
-
- switch (adc) {
- case MAX8997_ADC_GROUND:
- ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true);
- break;
- case MAX8997_ADC_MHL:
- max8997_muic_handle_mhl(info, true);
- break;
- case MAX8997_ADC_JIG_USB_1:
- case MAX8997_ADC_JIG_USB_2:
- ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, true);
- break;
- case MAX8997_ADC_DESKDOCK:
- case MAX8997_ADC_CARDOCK:
- ret = max8997_muic_handle_dock(info, adc, true);
- break;
- case MAX8997_ADC_JIG_UART:
- ret = max8997_muic_handle_jig_uart(info, true);
- break;
- case MAX8997_ADC_OPEN:
- ret = max8997_muic_handle_adc_detach(info);
- break;
- default:
- break;
- }
-
- info->pre_adc = adc;
-
- return ret;
-}
-
-static int max8997_muic_handle_charger_type(struct max8997_muic_info *info,
- enum max8997_muic_charger_type charger_type)
-{
- struct max8997_muic_platform_data *mdata = info->muic_pdata;
- u8 adc;
- int ret;
-
- ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_STATUS1, &adc);
- if (ret) {
- dev_err(info->dev, "failed to read muic register\n");
- goto out;
- }
-
- switch (charger_type) {
- case MAX8997_CHARGER_TYPE_NONE:
- if (mdata->charger_callback)
- mdata->charger_callback(false, charger_type);
- if (info->pre_charger_type == MAX8997_CHARGER_TYPE_USB) {
- max8997_muic_handle_usb(info,
- MAX8997_USB_DEVICE, false);
- }
- break;
- case MAX8997_CHARGER_TYPE_USB:
- if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) {
- max8997_muic_handle_usb(info,
- MAX8997_USB_DEVICE, true);
- }
- if (mdata->charger_callback)
- mdata->charger_callback(true, charger_type);
- break;
- case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
- case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
- case MAX8997_CHARGER_TYPE_500MA:
- case MAX8997_CHARGER_TYPE_1A:
- if (mdata->charger_callback)
- mdata->charger_callback(true, charger_type);
- break;
- default:
- break;
- }
-
- info->pre_charger_type = charger_type;
-out:
- return ret;
-}
-
-static void max8997_muic_irq_work(struct work_struct *work)
-{
- struct max8997_muic_info *info = container_of(work,
- struct max8997_muic_info, irq_work);
- struct max8997_platform_data *pdata =
- dev_get_platdata(info->iodev->dev);
- u8 status[3];
- u8 adc, chg_type;
-
- int irq_type = info->irq - pdata->irq_base;
- int ret;
-
- mutex_lock(&info->mutex);
-
- ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
- 3, status);
- if (ret) {
- dev_err(info->dev, "failed to read muic register\n");
- mutex_unlock(&info->mutex);
- return;
- }
-
- dev_dbg(info->dev, "%s: STATUS1:0x%x, 2:0x%x\n", __func__,
- status[0], status[1]);
-
- switch (irq_type) {
- case MAX8997_MUICIRQ_ADC:
- adc = status[0] & STATUS1_ADC_MASK;
- adc >>= STATUS1_ADC_SHIFT;
-
- max8997_muic_handle_adc(info, adc);
- break;
- case MAX8997_MUICIRQ_ChgTyp:
- chg_type = status[1] & STATUS2_CHGTYP_MASK;
- chg_type >>= STATUS2_CHGTYP_SHIFT;
-
- max8997_muic_handle_charger_type(info, chg_type);
- break;
- default:
- dev_info(info->dev, "misc interrupt: %s occurred\n",
- muic_irqs[irq_type].name);
- break;
- }
-
- mutex_unlock(&info->mutex);
-
- return;
-}
-
-static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
-{
- struct max8997_muic_info *info = data;
-
- dev_dbg(info->dev, "irq:%d\n", irq);
- info->irq = irq;
-
- schedule_work(&info->irq_work);
-
- return IRQ_HANDLED;
-}
-
-static void max8997_muic_detect_dev(struct max8997_muic_info *info)
-{
- int ret;
- u8 status[2], adc, chg_type;
-
- ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
- 2, status);
- if (ret) {
- dev_err(info->dev, "failed to read muic register\n");
- return;
- }
-
- dev_info(info->dev, "STATUS1:0x%x, STATUS2:0x%x\n",
- status[0], status[1]);
-
- adc = status[0] & STATUS1_ADC_MASK;
- adc >>= STATUS1_ADC_SHIFT;
-
- chg_type = status[1] & STATUS2_CHGTYP_MASK;
- chg_type >>= STATUS2_CHGTYP_SHIFT;
-
- max8997_muic_handle_adc(info, adc);
- max8997_muic_handle_charger_type(info, chg_type);
-}
-
-static void max8997_initialize_device(struct max8997_muic_info *info)
-{
- struct max8997_muic_platform_data *mdata = info->muic_pdata;
- int i;
-
- for (i = 0; i < mdata->num_init_data; i++) {
- max8997_write_reg(info->muic, mdata->init_data[i].addr,
- mdata->init_data[i].data);
- }
-}
-
-static int __devinit max8997_muic_probe(struct platform_device *pdev)
-{
- struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
- struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
- struct max8997_muic_info *info;
- int ret, i;
-
- info = kzalloc(sizeof(struct max8997_muic_info), GFP_KERNEL);
- if (!info) {
- dev_err(&pdev->dev, "failed to allocate memory\n");
- ret = -ENOMEM;
- goto err_kfree;
- }
-
- if (!pdata->muic_pdata) {
- dev_err(&pdev->dev, "failed to get platform_data\n");
- ret = -EINVAL;
- goto err_pdata;
- }
- info->muic_pdata = pdata->muic_pdata;
-
- info->dev = &pdev->dev;
- info->iodev = iodev;
- info->muic = iodev->muic;
-
- platform_set_drvdata(pdev, info);
- mutex_init(&info->mutex);
-
- INIT_WORK(&info->irq_work, max8997_muic_irq_work);
-
- for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
- struct max8997_muic_irq *muic_irq = &muic_irqs[i];
-
- ret = request_threaded_irq(pdata->irq_base + muic_irq->irq,
- NULL, max8997_muic_irq_handler,
- 0, muic_irq->name,
- info);
- if (ret) {
- dev_err(&pdev->dev,
- "failed: irq request (IRQ: %d,"
- " error :%d)\n",
- muic_irq->irq, ret);
-
- for (i = i - 1; i >= 0; i--)
- free_irq(muic_irq->irq, info);
-
- goto err_irq;
- }
- }
-
- /* Initialize registers according to platform data */
- max8997_initialize_device(info);
-
- /* Initial device detection */
- max8997_muic_detect_dev(info);
-
- return ret;
-
-err_irq:
-err_pdata:
- kfree(info);
-err_kfree:
- return ret;
-}
-
-static int __devexit max8997_muic_remove(struct platform_device *pdev)
-{
- struct max8997_muic_info *info = platform_get_drvdata(pdev);
- struct max8997_platform_data *pdata =
- dev_get_platdata(info->iodev->dev);
- int i;
-
- for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
- free_irq(pdata->irq_base + muic_irqs[i].irq, info);
- cancel_work_sync(&info->irq_work);
-
- kfree(info);
-
- return 0;
-}
-
-static struct platform_driver max8997_muic_driver = {
- .driver = {
- .name = "max8997-muic",
- .owner = THIS_MODULE,
- },
- .probe = max8997_muic_probe,
- .remove = __devexit_p(max8997_muic_remove),
-};
-
-module_platform_driver(max8997_muic_driver);
-
-MODULE_DESCRIPTION("Maxim MAX8997 MUIC driver");
-MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
-MODULE_LICENSE("GPL");
git.openpandora.org / pandora-kernel.git / commitdiff