/*
- * max8997-muic.c - MAX8997 muic driver for the Maxim 8997
+ * extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC
*
- * Copyright (C) 2011 Samsung Electrnoics
+ * Copyright (C) 2012 Samsung Electrnoics
* Donggeun Kim <dg77.kim@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* 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/kobject.h>
#include <linux/mfd/max8997.h>
#include <linux/mfd/max8997-private.h>
+#include <linux/extcon.h>
+
+#define DEV_NAME "max8997-muic"
/* MAX8997-MUIC STATUS1 register */
#define STATUS1_ADC_SHIFT 0
struct max8997_muic_info {
struct device *dev;
- struct max8997_dev *iodev;
struct i2c_client *muic;
struct max8997_muic_platform_data *muic_pdata;
int pre_adc;
struct mutex mutex;
+
+ struct extcon_dev *edev;
+};
+
+const char *max8997_extcon_cable[] = {
+ [0] = "USB",
+ [1] = "USB-Host",
+ [2] = "TA",
+ [3] = "Fast-charger",
+ [4] = "Slow-charger",
+ [5] = "Charge-downstream",
+ [6] = "MHL",
+ [7] = "Dock-desk",
+ [7] = "Dock-card",
+ [8] = "JIG",
+
+ NULL,
};
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) {
}
}
- if (mdata->usb_callback)
- mdata->usb_callback(usb_type, attached);
+ switch (usb_type) {
+ case MAX8997_USB_HOST:
+ extcon_set_cable_state(info->edev, "USB-Host", attached);
+ break;
+ case MAX8997_USB_DEVICE:
+ extcon_set_cable_state(info->edev, "USB", attached);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
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 */
switch (adc) {
case MAX8997_ADC_DESKDOCK:
- if (mdata->deskdock_callback)
- mdata->deskdock_callback(attached);
+ extcon_set_cable_state(info->edev, "Dock-desk", attached);
break;
case MAX8997_ADC_CARDOCK:
- if (mdata->cardock_callback)
- mdata->cardock_callback(attached);
+ extcon_set_cable_state(info->edev, "Dock-card", attached);
break;
default:
+ ret = -EINVAL;
break;
}
out:
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 */
goto out;
}
- if (mdata->uart_callback)
- mdata->uart_callback(attached);
+ extcon_set_cable_state(info->edev, "JIG", attached);
out:
return ret;
}
ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
break;
case MAX8997_ADC_MHL:
- max8997_muic_handle_mhl(info, false);
+ extcon_set_cable_state(info->edev, "MHL", false);
break;
case MAX8997_ADC_JIG_USB_1:
case MAX8997_ADC_JIG_USB_2:
ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true);
break;
case MAX8997_ADC_MHL:
- max8997_muic_handle_mhl(info, true);
+ extcon_set_cable_state(info->edev, "MHL", true);
break;
case MAX8997_ADC_JIG_USB_1:
case MAX8997_ADC_JIG_USB_2:
ret = max8997_muic_handle_adc_detach(info);
break;
default:
- break;
+ ret = -EINVAL;
+ goto out;
}
info->pre_adc = adc;
+out:
+ return ret;
+}
+
+static int max8997_muic_handle_charger_type_detach(
+ struct max8997_muic_info *info)
+{
+ int ret = 0;
+
+ switch (info->pre_charger_type) {
+ case MAX8997_CHARGER_TYPE_USB:
+ extcon_set_cable_state(info->edev, "USB", false);
+ break;
+ case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
+ extcon_set_cable_state(info->edev, "Charge-downstream", false);
+ break;
+ case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
+ extcon_set_cable_state(info->edev, "TA", false);
+ break;
+ case MAX8997_CHARGER_TYPE_500MA:
+ extcon_set_cable_state(info->edev, "Slow-charger", false);
+ break;
+ case MAX8997_CHARGER_TYPE_1A:
+ extcon_set_cable_state(info->edev, "Fast-charger", false);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
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;
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);
- }
+ ret = max8997_muic_handle_charger_type_detach(info);
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:
+ extcon_set_cable_state(info->edev, "Charge-downstream", true);
+ break;
case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
+ extcon_set_cable_state(info->edev, "TA", true);
+ break;
case MAX8997_CHARGER_TYPE_500MA:
+ extcon_set_cable_state(info->edev, "Slow-charger", true);
+ break;
case MAX8997_CHARGER_TYPE_1A:
- if (mdata->charger_callback)
- mdata->charger_callback(true, charger_type);
+ extcon_set_cable_state(info->edev, "Fast-charger", true);
break;
default:
- break;
+ ret = -EINVAL;
+ goto out;
}
info->pre_charger_type = charger_type;
{
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];
+ struct max8997_dev *max8997 = i2c_get_clientdata(info->muic);
+ u8 status[2];
u8 adc, chg_type;
- int irq_type = info->irq - pdata->irq_base;
+ int irq_type = info->irq - max8997->irq_base;
int ret;
mutex_lock(&info->mutex);
ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
- 3, status);
+ 2, status);
if (ret) {
dev_err(info->dev, "failed to read muic register\n");
mutex_unlock(&info->mutex);
max8997_muic_handle_charger_type(info, chg_type);
break;
default:
- dev_info(info->dev, "misc interrupt: %s occurred\n",
- muic_irqs[irq_type].name);
+ dev_info(info->dev, "misc interrupt: irq %d occurred\n",
+ irq_type);
break;
}
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_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
+ struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
struct max8997_muic_info *info;
int ret, i;
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;
+ info->muic = max8997->muic;
platform_set_drvdata(pdev, info);
mutex_init(&info->mutex);
}
}
+ /* External connector */
+ info->edev = kzalloc(sizeof(struct extcon_dev), GFP_KERNEL);
+ if (!info->edev) {
+ dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
+ ret = -ENOMEM;
+ goto err_irq;
+ }
+ info->edev->name = DEV_NAME;
+ info->edev->supported_cable = max8997_extcon_cable;
+ ret = extcon_dev_register(info->edev, NULL);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register extcon device\n");
+ goto err_extcon;
+ }
+
/* Initialize registers according to platform data */
- max8997_initialize_device(info);
+ if (pdata->muic_pdata) {
+ struct max8997_muic_platform_data *mdata = info->muic_pdata;
+
+ for (i = 0; i < mdata->num_init_data; i++) {
+ max8997_write_reg(info->muic, mdata->init_data[i].addr,
+ mdata->init_data[i].data);
+ }
+ }
/* Initial device detection */
max8997_muic_detect_dev(info);
return ret;
+err_extcon:
+ kfree(info->edev);
err_irq:
while (--i >= 0)
free_irq(pdata->irq_base + muic_irqs[i].irq, info);
-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);
+ struct max8997_dev *max8997 = i2c_get_clientdata(info->muic);
int i;
for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
- free_irq(pdata->irq_base + muic_irqs[i].irq, info);
+ free_irq(max8997->irq_base + muic_irqs[i].irq, info);
cancel_work_sync(&info->irq_work);
+ extcon_dev_unregister(info->edev);
+
kfree(info);
return 0;
static struct platform_driver max8997_muic_driver = {
.driver = {
- .name = "max8997-muic",
+ .name = DEV_NAME,
.owner = THIS_MODULE,
},
.probe = max8997_muic_probe,
module_platform_driver(max8997_muic_driver);
-MODULE_DESCRIPTION("Maxim MAX8997 MUIC driver");
+MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver");
MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
MODULE_LICENSE("GPL");
git.openpandora.org / pandora-kernel.git / blobdiff