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/*
* arch/arm/mach-tegra/tegra_rfkill_odm.c
*
* RF kill device using NVIDIA Tegra ODM kit
*
* Copyright (c) 2009, NVIDIA 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/rfkill.h>
#include "mach/nvrm_linux.h"
#include "nvodm_query.h"
#include "nvrm_gpio.h"
#include "nvodm_services.h"
#include "nvodm_query_discovery.h"
#define DRIVER_NAME "tegra_rfkill"
#define DRIVER_DESC "Nvidia Tegra rfkill"
static NvRmGpioHandle hGpio = NULL;
static NvRmGpioPinHandle hBlueToothResetPin = 0;
static NvU32 blueToothPowerRailId = 0xff;
static struct rfkill *bt = NULL;
void rfkill_switch_all(enum rfkill_type type, enum rfkill_state state);
static int bluetooth_set_power(void *data, enum rfkill_state state)
{
NvOdmServicesPmuHandle hPmu;
NvOdmServicesPmuVddRailCapabilities vddrailcap;
NvU32 settletime = 0;
NvU32 GpioLevel;
if (blueToothPowerRailId == 0xff || !hBlueToothResetPin || !hGpio)
return -ENXIO;
hPmu = NvOdmServicesPmuOpen();
if (!hPmu)
return -ENXIO;
switch (state) {
case RFKILL_STATE_UNBLOCKED:
NvOdmServicesPmuGetCapabilities(hPmu, blueToothPowerRailId,
&vddrailcap);
NvOdmServicesPmuSetVoltage(hPmu, blueToothPowerRailId,
vddrailcap.requestMilliVolts, &settletime);
if (settletime)
NvOdmOsWaitUS(settletime);
/* Pulse a reset */
GpioLevel = 0;
NvRmGpioWritePins(hGpio, &hBlueToothResetPin, &GpioLevel, 1);
/* Configure as output */
NvRmGpioConfigPins(hGpio, &hBlueToothResetPin, 1,
NvRmGpioPinMode_Output);
/* Give 5 milli seconds for the reset pulse */
NvOdmOsSleepMS(5);
GpioLevel = 1;
NvRmGpioWritePins(hGpio, &hBlueToothResetPin, &GpioLevel, 1);
printk(KERN_INFO "Bluetooth power ON\n");
break;
case RFKILL_STATE_SOFT_BLOCKED:
/* Disable power */
GpioLevel = 0;
NvRmGpioWritePins(hGpio, &hBlueToothResetPin, &GpioLevel, 1);
/* Configure as output */
NvRmGpioConfigPins(hGpio, &hBlueToothResetPin, 1,
NvRmGpioPinMode_Output);
NvOdmServicesPmuSetVoltage( hPmu, blueToothPowerRailId,
NVODM_VOLTAGE_OFF, &settletime);
if (settletime)
NvOdmOsWaitUS(settletime);
printk(KERN_INFO "Bluetooth power OFF\n");
break;
default:
printk(KERN_ERR "Bad bluetooth rfkill state %d\n", state);
}
NvOdmServicesPmuClose(hPmu);
return 0;
}
static int __init tegra_rfkill_probe(struct platform_device *pdev)
{
int rc;
const NvOdmPeripheralConnectivity *conn = NULL;
NvU32 port = 0xffff, pin = 0xffff;
NvError err;
NvU32 i;
NvU64 bluetooth = NV_ODM_GUID('b','l','u','t','o','o','t','h');
/* conn will be null if bluetooth is not present. */
conn =
NvOdmPeripheralGetGuid(bluetooth);
if (!conn)
return -ENXIO;
for (i = 0; i < conn->NumAddress; i++) {
if (conn->AddressList[i].Interface == NvOdmIoModule_Gpio) {
port = conn->AddressList[i].Instance;
pin = conn->AddressList[i].Address;
}
if (conn->AddressList[i].Interface == NvOdmIoModule_Vdd) {
blueToothPowerRailId = conn->AddressList[i].Address;
}
}
if (port == 0xffff || pin == 0xffff || blueToothPowerRailId == 0xff) {
printk(KERN_ERR "bluetooth information is invalid\n");
return -ENXIO;
}
err = NvRmGpioOpen(s_hRmGlobal, &hGpio);
if (err) {
printk(KERN_ERR "NvRmGpioOpen failed\n");
return -ENXIO;
}
err = NvRmGpioAcquirePinHandle(hGpio, port, pin, &hBlueToothResetPin);
if (err) {
printk(KERN_ERR "NvRmGpioAcquirePinHandle failed\n");
NvRmGpioClose(hGpio);
return -ENXIO;
}
rfkill_switch_all(RFKILL_TYPE_BLUETOOTH, RFKILL_STATE_SOFT_BLOCKED);
bluetooth_set_power(NULL, RFKILL_STATE_SOFT_BLOCKED);
bt = rfkill_allocate(&pdev->dev, RFKILL_TYPE_BLUETOOTH);
if (!bt) {
rc = -ENOMEM;
goto fail;
}
bt->name = "unknown"; /* FIXME how do we get this name? */
bt->state = RFKILL_STATE_SOFT_BLOCKED;
bt->user_claim = 0;
bt->user_claim_unsupported = 1;
bt->data = NULL;
bt->toggle_radio = bluetooth_set_power;
rc = rfkill_register(bt);
if (rc)
goto fail;
return rc;
fail:
if (hBlueToothResetPin)
NvRmGpioReleasePinHandles(hGpio, &hBlueToothResetPin, 1);
if (hGpio)
NvRmGpioClose(hGpio);
if (bt)
rfkill_free(bt);
return rc;
}
static int __init tegra_rfkill_remove(struct platform_device *pdev)
{
rfkill_switch_all(RFKILL_TYPE_BLUETOOTH, RFKILL_STATE_SOFT_BLOCKED);
bluetooth_set_power(NULL, RFKILL_STATE_SOFT_BLOCKED);
if (hBlueToothResetPin)
NvRmGpioReleasePinHandles(hGpio, &hBlueToothResetPin, 1);
if (hGpio)
NvRmGpioClose(hGpio);
if (bt) {
rfkill_unregister(bt);
rfkill_free(bt);
}
return 0;
}
static struct platform_driver tegra_rfkill_driver = {
.probe = tegra_rfkill_probe,
.remove = tegra_rfkill_remove,
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
},
};
static int __init tegra_rfkill_init(void)
{
return platform_driver_register(&tegra_rfkill_driver);
}
module_init(tegra_rfkill_init);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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