mirror of https://gitee.com/openkylin/linux.git
power_supply: Add isp1704 charger detection driver
NXP ISP1704 is Battery Charging Specification 1.0 compliant USB transceiver. This adds a power supply driver for ISP1704 and ISP1707 USB transceivers. Signed-off-by: Heikki Krogerus <ext-heikki.krogerus@nokia.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
This commit is contained in:
Heikki Krogerus
Anton Vorontsov
parent
763008c435
commit
ec46475f3e
|
|
@ -166,4 +166,11 @@ config BATTERY_INTEL_MID
|
|||
Say Y here to enable the battery driver on Intel MID
|
||||
platforms.
|
||||
|
||||
config CHARGER_ISP1704
|
||||
tristate "ISP1704 USB Charger Detection"
|
||||
depends on USB_OTG_UTILS
|
||||
help
|
||||
Say Y to enable support for USB Charger Detection with
|
||||
ISP1707/ISP1704 USB transceivers.
|
||||
|
||||
endif # POWER_SUPPLY
|
||||
|
|
|
|||
|
|
@ -37,3 +37,4 @@ obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o
|
|||
obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
|
||||
obj-$(CONFIG_BATTERY_JZ4740) += jz4740-battery.o
|
||||
obj-$(CONFIG_BATTERY_INTEL_MID) += intel_mid_battery.o
|
||||
obj-$(CONFIG_CHARGER_ISP1704) += isp1704_charger.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,369 @@
|
|||
/*
|
||||
* ISP1704 USB Charger Detection driver
|
||||
*
|
||||
* Copyright (C) 2010 Nokia Corporation
|
||||
*
|
||||
* 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/err.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/sysfs.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/power_supply.h>
|
||||
#include <linux/delay.h>
|
||||
|
||||
#include <linux/usb/otg.h>
|
||||
#include <linux/usb/ulpi.h>
|
||||
#include <linux/usb/ch9.h>
|
||||
#include <linux/usb/gadget.h>
|
||||
|
||||
/* Vendor specific Power Control register */
|
||||
#define ISP1704_PWR_CTRL 0x3d
|
||||
#define ISP1704_PWR_CTRL_SWCTRL (1 << 0)
|
||||
#define ISP1704_PWR_CTRL_DET_COMP (1 << 1)
|
||||
#define ISP1704_PWR_CTRL_BVALID_RISE (1 << 2)
|
||||
#define ISP1704_PWR_CTRL_BVALID_FALL (1 << 3)
|
||||
#define ISP1704_PWR_CTRL_DP_WKPU_EN (1 << 4)
|
||||
#define ISP1704_PWR_CTRL_VDAT_DET (1 << 5)
|
||||
#define ISP1704_PWR_CTRL_DPVSRC_EN (1 << 6)
|
||||
#define ISP1704_PWR_CTRL_HWDETECT (1 << 7)
|
||||
|
||||
#define NXP_VENDOR_ID 0x04cc
|
||||
|
||||
static u16 isp170x_id[] = {
|
||||
0x1704,
|
||||
0x1707,
|
||||
};
|
||||
|
||||
struct isp1704_charger {
|
||||
struct device *dev;
|
||||
struct power_supply psy;
|
||||
struct otg_transceiver *otg;
|
||||
struct notifier_block nb;
|
||||
struct work_struct work;
|
||||
|
||||
char model[7];
|
||||
unsigned present:1;
|
||||
};
|
||||
|
||||
/*
|
||||
* ISP1704 detects PS/2 adapters as charger. To make sure the detected charger
|
||||
* is actually a dedicated charger, the following steps need to be taken.
|
||||
*/
|
||||
static inline int isp1704_charger_verify(struct isp1704_charger *isp)
|
||||
{
|
||||
int ret = 0;
|
||||
u8 r;
|
||||
|
||||
/* Reset the transceiver */
|
||||
r = otg_io_read(isp->otg, ULPI_FUNC_CTRL);
|
||||
r |= ULPI_FUNC_CTRL_RESET;
|
||||
otg_io_write(isp->otg, ULPI_FUNC_CTRL, r);
|
||||
usleep_range(1000, 2000);
|
||||
|
||||
/* Set normal mode */
|
||||
r &= ~(ULPI_FUNC_CTRL_RESET | ULPI_FUNC_CTRL_OPMODE_MASK);
|
||||
otg_io_write(isp->otg, ULPI_FUNC_CTRL, r);
|
||||
|
||||
/* Clear the DP and DM pull-down bits */
|
||||
r = ULPI_OTG_CTRL_DP_PULLDOWN | ULPI_OTG_CTRL_DM_PULLDOWN;
|
||||
otg_io_write(isp->otg, ULPI_CLR(ULPI_OTG_CTRL), r);
|
||||
|
||||
/* Enable strong pull-up on DP (1.5K) and reset */
|
||||
r = ULPI_FUNC_CTRL_TERMSELECT | ULPI_FUNC_CTRL_RESET;
|
||||
otg_io_write(isp->otg, ULPI_SET(ULPI_FUNC_CTRL), r);
|
||||
usleep_range(1000, 2000);
|
||||
|
||||
/* Read the line state */
|
||||
if (!otg_io_read(isp->otg, ULPI_DEBUG)) {
|
||||
/* Disable strong pull-up on DP (1.5K) */
|
||||
otg_io_write(isp->otg, ULPI_CLR(ULPI_FUNC_CTRL),
|
||||
ULPI_FUNC_CTRL_TERMSELECT);
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Is it a charger or PS/2 connection */
|
||||
|
||||
/* Enable weak pull-up resistor on DP */
|
||||
otg_io_write(isp->otg, ULPI_SET(ISP1704_PWR_CTRL),
|
||||
ISP1704_PWR_CTRL_DP_WKPU_EN);
|
||||
|
||||
/* Disable strong pull-up on DP (1.5K) */
|
||||
otg_io_write(isp->otg, ULPI_CLR(ULPI_FUNC_CTRL),
|
||||
ULPI_FUNC_CTRL_TERMSELECT);
|
||||
|
||||
/* Enable weak pull-down resistor on DM */
|
||||
otg_io_write(isp->otg, ULPI_SET(ULPI_OTG_CTRL),
|
||||
ULPI_OTG_CTRL_DM_PULLDOWN);
|
||||
|
||||
/* It's a charger if the line states are clear */
|
||||
if (!(otg_io_read(isp->otg, ULPI_DEBUG)))
|
||||
ret = 1;
|
||||
|
||||
/* Disable weak pull-up resistor on DP */
|
||||
otg_io_write(isp->otg, ULPI_CLR(ISP1704_PWR_CTRL),
|
||||
ISP1704_PWR_CTRL_DP_WKPU_EN);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline int isp1704_charger_detect(struct isp1704_charger *isp)
|
||||
{
|
||||
unsigned long timeout;
|
||||
u8 r;
|
||||
int ret = 0;
|
||||
|
||||
/* set SW control bit in PWR_CTRL register */
|
||||
otg_io_write(isp->otg, ISP1704_PWR_CTRL,
|
||||
ISP1704_PWR_CTRL_SWCTRL);
|
||||
|
||||
/* enable manual charger detection */
|
||||
r = (ISP1704_PWR_CTRL_SWCTRL | ISP1704_PWR_CTRL_DPVSRC_EN);
|
||||
otg_io_write(isp->otg, ULPI_SET(ISP1704_PWR_CTRL), r);
|
||||
usleep_range(1000, 2000);
|
||||
|
||||
timeout = jiffies + msecs_to_jiffies(300);
|
||||
do {
|
||||
/* Check if there is a charger */
|
||||
if (otg_io_read(isp->otg, ISP1704_PWR_CTRL)
|
||||
& ISP1704_PWR_CTRL_VDAT_DET) {
|
||||
ret = isp1704_charger_verify(isp);
|
||||
break;
|
||||
}
|
||||
} while (!time_after(jiffies, timeout));
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void isp1704_charger_work(struct work_struct *data)
|
||||
{
|
||||
int detect;
|
||||
struct isp1704_charger *isp =
|
||||
container_of(data, struct isp1704_charger, work);
|
||||
|
||||
/*
|
||||
* FIXME Only supporting dedicated chargers even though isp1704 can
|
||||
* detect HUB and HOST chargers. If the device has already been
|
||||
* enumerated, the detection will break the connection.
|
||||
*/
|
||||
if (isp->otg->state != OTG_STATE_B_IDLE)
|
||||
return;
|
||||
|
||||
/* disable data pullups */
|
||||
if (isp->otg->gadget)
|
||||
usb_gadget_disconnect(isp->otg->gadget);
|
||||
|
||||
/* detect charger */
|
||||
detect = isp1704_charger_detect(isp);
|
||||
if (detect) {
|
||||
isp->present = detect;
|
||||
power_supply_changed(&isp->psy);
|
||||
}
|
||||
|
||||
/* enable data pullups */
|
||||
if (isp->otg->gadget)
|
||||
usb_gadget_connect(isp->otg->gadget);
|
||||
}
|
||||
|
||||
static int isp1704_notifier_call(struct notifier_block *nb,
|
||||
unsigned long event, void *unused)
|
||||
{
|
||||
struct isp1704_charger *isp =
|
||||
container_of(nb, struct isp1704_charger, nb);
|
||||
|
||||
switch (event) {
|
||||
case USB_EVENT_VBUS:
|
||||
schedule_work(&isp->work);
|
||||
break;
|
||||
case USB_EVENT_NONE:
|
||||
if (isp->present) {
|
||||
isp->present = 0;
|
||||
power_supply_changed(&isp->psy);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
return NOTIFY_DONE;
|
||||
}
|
||||
|
||||
return NOTIFY_OK;
|
||||
}
|
||||
|
||||
static int isp1704_charger_get_property(struct power_supply *psy,
|
||||
enum power_supply_property psp,
|
||||
union power_supply_propval *val)
|
||||
{
|
||||
struct isp1704_charger *isp =
|
||||
container_of(psy, struct isp1704_charger, psy);
|
||||
|
||||
switch (psp) {
|
||||
case POWER_SUPPLY_PROP_PRESENT:
|
||||
val->intval = isp->present;
|
||||
break;
|
||||
case POWER_SUPPLY_PROP_MODEL_NAME:
|
||||
val->strval = isp->model;
|
||||
break;
|
||||
case POWER_SUPPLY_PROP_MANUFACTURER:
|
||||
val->strval = "NXP";
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static enum power_supply_property power_props[] = {
|
||||
POWER_SUPPLY_PROP_PRESENT,
|
||||
POWER_SUPPLY_PROP_MODEL_NAME,
|
||||
POWER_SUPPLY_PROP_MANUFACTURER,
|
||||
};
|
||||
|
||||
static inline int isp1704_test_ulpi(struct isp1704_charger *isp)
|
||||
{
|
||||
int vendor;
|
||||
int product;
|
||||
int i;
|
||||
int ret = -ENODEV;
|
||||
|
||||
/* Test ULPI interface */
|
||||
ret = otg_io_write(isp->otg, ULPI_SCRATCH, 0xaa);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = otg_io_read(isp->otg, ULPI_SCRATCH);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
if (ret != 0xaa)
|
||||
return -ENODEV;
|
||||
|
||||
/* Verify the product and vendor id matches */
|
||||
vendor = otg_io_read(isp->otg, ULPI_VENDOR_ID_LOW);
|
||||
vendor |= otg_io_read(isp->otg, ULPI_VENDOR_ID_HIGH) << 8;
|
||||
if (vendor != NXP_VENDOR_ID)
|
||||
return -ENODEV;
|
||||
|
||||
product = otg_io_read(isp->otg, ULPI_PRODUCT_ID_LOW);
|
||||
product |= otg_io_read(isp->otg, ULPI_PRODUCT_ID_HIGH) << 8;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(isp170x_id); i++) {
|
||||
if (product == isp170x_id[i]) {
|
||||
sprintf(isp->model, "isp%x", product);
|
||||
return product;
|
||||
}
|
||||
}
|
||||
|
||||
dev_err(isp->dev, "product id %x not matching known ids", product);
|
||||
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
static int __devinit isp1704_charger_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct isp1704_charger *isp;
|
||||
int ret = -ENODEV;
|
||||
|
||||
isp = kzalloc(sizeof *isp, GFP_KERNEL);
|
||||
if (!isp)
|
||||
return -ENOMEM;
|
||||
|
||||
isp->otg = otg_get_transceiver();
|
||||
if (!isp->otg)
|
||||
goto fail0;
|
||||
|
||||
ret = isp1704_test_ulpi(isp);
|
||||
if (ret < 0)
|
||||
goto fail1;
|
||||
|
||||
isp->dev = &pdev->dev;
|
||||
platform_set_drvdata(pdev, isp);
|
||||
|
||||
isp->psy.name = "isp1704";
|
||||
isp->psy.type = POWER_SUPPLY_TYPE_USB;
|
||||
isp->psy.properties = power_props;
|
||||
isp->psy.num_properties = ARRAY_SIZE(power_props);
|
||||
isp->psy.get_property = isp1704_charger_get_property;
|
||||
|
||||
ret = power_supply_register(isp->dev, &isp->psy);
|
||||
if (ret)
|
||||
goto fail1;
|
||||
|
||||
/*
|
||||
* REVISIT: using work in order to allow the otg notifications to be
|
||||
* made atomically in the future.
|
||||
*/
|
||||
INIT_WORK(&isp->work, isp1704_charger_work);
|
||||
|
||||
isp->nb.notifier_call = isp1704_notifier_call;
|
||||
|
||||
ret = otg_register_notifier(isp->otg, &isp->nb);
|
||||
if (ret)
|
||||
goto fail2;
|
||||
|
||||
dev_info(isp->dev, "registered with product id %s\n", isp->model);
|
||||
|
||||
return 0;
|
||||
fail2:
|
||||
power_supply_unregister(&isp->psy);
|
||||
fail1:
|
||||
otg_put_transceiver(isp->otg);
|
||||
fail0:
|
||||
kfree(isp);
|
||||
|
||||
dev_err(&pdev->dev, "failed to register isp1704 with error %d\n", ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit isp1704_charger_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct isp1704_charger *isp = platform_get_drvdata(pdev);
|
||||
|
||||
otg_unregister_notifier(isp->otg, &isp->nb);
|
||||
power_supply_unregister(&isp->psy);
|
||||
otg_put_transceiver(isp->otg);
|
||||
kfree(isp);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver isp1704_charger_driver = {
|
||||
.driver = {
|
||||
.name = "isp1704_charger",
|
||||
},
|
||||
.probe = isp1704_charger_probe,
|
||||
.remove = __devexit_p(isp1704_charger_remove),
|
||||
};
|
||||
|
||||
static int __init isp1704_charger_init(void)
|
||||
{
|
||||
return platform_driver_register(&isp1704_charger_driver);
|
||||
}
|
||||
module_init(isp1704_charger_init);
|
||||
|
||||
static void __exit isp1704_charger_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&isp1704_charger_driver);
|
||||
}
|
||||
module_exit(isp1704_charger_exit);
|
||||
|
||||
MODULE_ALIAS("platform:isp1704_charger");
|
||||
MODULE_AUTHOR("Nokia Corporation");
|
||||
MODULE_DESCRIPTION("ISP170x USB Charger driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue