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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Support for rfkill on some Fujitsu-Siemens Amilo laptops.
* Copyright 2011 Ben Hutchings.
*
* Based in part on the fsam7440 driver, which is:
* Copyright 2005 Alejandro Vidal Mata & Javier Vidal Mata.
* and on the fsaa1655g driver, which is:
* Copyright 2006 Martin Večeřa.
*/
#include <linux/module.h>
#include <linux/dmi.h>
#include <linux/i8042.h>
#include <linux/io.h>
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <linux/rfkill.h>
/*
* These values were obtained from disassembling and debugging the
* PM.exe program installed in the Fujitsu-Siemens AMILO A1655G
*/
#define A1655_WIFI_COMMAND 0x10C5
#define A1655_WIFI_ON 0x25
#define A1655_WIFI_OFF 0x45
static int amilo_a1655_rfkill_set_block(void *data, bool blocked)
{
u8 param = blocked ? A1655_WIFI_OFF : A1655_WIFI_ON;
int rc;
i8042_lock_chip();
rc = i8042_command(¶m, A1655_WIFI_COMMAND);
i8042_unlock_chip();
return rc;
}
static const struct rfkill_ops amilo_a1655_rfkill_ops = {
.set_block = amilo_a1655_rfkill_set_block
};
/*
* These values were obtained from disassembling the PM.exe program
* installed in the Fujitsu-Siemens AMILO M 7440
*/
#define M7440_PORT1 0x118f
#define M7440_PORT2 0x118e
#define M7440_RADIO_ON1 0x12
#define M7440_RADIO_ON2 0x80
#define M7440_RADIO_OFF1 0x10
#define M7440_RADIO_OFF2 0x00
static int amilo_m7440_rfkill_set_block(void *data, bool blocked)
{
u8 val1 = blocked ? M7440_RADIO_OFF1 : M7440_RADIO_ON1;
u8 val2 = blocked ? M7440_RADIO_OFF2 : M7440_RADIO_ON2;
outb(val1, M7440_PORT1);
outb(val2, M7440_PORT2);
/* Check whether the state has changed correctly */
if (inb(M7440_PORT1) != val1 || inb(M7440_PORT2) != val2)
return -EIO;
return 0;
}
static const struct rfkill_ops amilo_m7440_rfkill_ops = {
.set_block = amilo_m7440_rfkill_set_block
};
static const struct dmi_system_id amilo_rfkill_id_table[] = {
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
DMI_MATCH(DMI_BOARD_NAME, "AMILO A1655"),
},
.driver_data = (void *)&amilo_a1655_rfkill_ops
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
DMI_MATCH(DMI_BOARD_NAME, "AMILO L1310"),
},
.driver_data = (void *)&amilo_a1655_rfkill_ops
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
DMI_MATCH(DMI_BOARD_NAME, "AMILO M7440"),
},
.driver_data = (void *)&amilo_m7440_rfkill_ops
},
{}
};
static struct platform_device *amilo_rfkill_pdev;
static struct rfkill *amilo_rfkill_dev;
static int amilo_rfkill_probe(struct platform_device *device)
{
int rc;
const struct dmi_system_id *system_id =
dmi_first_match(amilo_rfkill_id_table);
if (!system_id)
return -ENXIO;
amilo_rfkill_dev = rfkill_alloc(KBUILD_MODNAME, &device->dev,
RFKILL_TYPE_WLAN,
system_id->driver_data, NULL);
if (!amilo_rfkill_dev)
return -ENOMEM;
rc = rfkill_register(amilo_rfkill_dev);
if (rc)
goto fail;
return 0;
fail:
rfkill_destroy(amilo_rfkill_dev);
return rc;
}
static int amilo_rfkill_remove(struct platform_device *device)
{
rfkill_unregister(amilo_rfkill_dev);
rfkill_destroy(amilo_rfkill_dev);
return 0;
}
static struct platform_driver amilo_rfkill_driver = {
.driver = {
.name = KBUILD_MODNAME,
},
.probe = amilo_rfkill_probe,
.remove = amilo_rfkill_remove,
};
static int __init amilo_rfkill_init(void)
{
int rc;
if (dmi_first_match(amilo_rfkill_id_table) == NULL)
return -ENODEV;
rc = platform_driver_register(&amilo_rfkill_driver);
if (rc)
return rc;
amilo_rfkill_pdev = platform_device_register_simple(KBUILD_MODNAME, -1,
NULL, 0);
if (IS_ERR(amilo_rfkill_pdev)) {
rc = PTR_ERR(amilo_rfkill_pdev);
goto fail;
}
return 0;
fail:
platform_driver_unregister(&amilo_rfkill_driver);
return rc;
}
static void __exit amilo_rfkill_exit(void)
{
platform_device_unregister(amilo_rfkill_pdev);
platform_driver_unregister(&amilo_rfkill_driver);
}
MODULE_AUTHOR("Ben Hutchings <ben@decadent.org.uk>");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(dmi, amilo_rfkill_id_table);
module_init(amilo_rfkill_init);
module_exit(amilo_rfkill_exit);
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