[mirror_ubuntu-bionic-kernel.git] / drivers / platform / x86 / amilo-rfkill.c

/*
 * 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.
 *
 * 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.
 */

#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(&param, 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);
Commit	Line	Data
c215ab9a BH	1	/*
	2	* Support for rfkill on some Fujitsu-Siemens Amilo laptops.
	3	* Copyright 2011 Ben Hutchings.
	4	*
	5	* Based in part on the fsam7440 driver, which is:
	6	* Copyright 2005 Alejandro Vidal Mata & Javier Vidal Mata.
	7	* and on the fsaa1655g driver, which is:
	8	* Copyright 2006 Martin Večeřa.
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/dmi.h>
	18	#include <linux/i8042.h>
	19	#include <linux/io.h>
	20	#include <linux/moduleparam.h>
	21	#include <linux/platform_device.h>
	22	#include <linux/rfkill.h>
	23
	24	/*
	25	* These values were obtained from disassembling and debugging the
	26	* PM.exe program installed in the Fujitsu-Siemens AMILO A1655G
	27	*/
	28	#define A1655_WIFI_COMMAND 0x10C5
	29	#define A1655_WIFI_ON 0x25
	30	#define A1655_WIFI_OFF 0x45
	31
	32	static int amilo_a1655_rfkill_set_block(void *data, bool blocked)
	33	{
	34	u8 param = blocked ? A1655_WIFI_OFF : A1655_WIFI_ON;
	35	int rc;
	36
	37	i8042_lock_chip();
	38	rc = i8042_command(&param, A1655_WIFI_COMMAND);
	39	i8042_unlock_chip();
	40	return rc;
	41	}
	42
	43	static const struct rfkill_ops amilo_a1655_rfkill_ops = {
	44	.set_block = amilo_a1655_rfkill_set_block
	45	};
	46
	47	/*
	48	* These values were obtained from disassembling the PM.exe program
	49	* installed in the Fujitsu-Siemens AMILO M 7440
	50	*/
	51	#define M7440_PORT1 0x118f
	52	#define M7440_PORT2 0x118e
	53	#define M7440_RADIO_ON1 0x12
	54	#define M7440_RADIO_ON2 0x80
	55	#define M7440_RADIO_OFF1 0x10
	56	#define M7440_RADIO_OFF2 0x00
	57
	58	static int amilo_m7440_rfkill_set_block(void *data, bool blocked)
	59	{
	60	u8 val1 = blocked ? M7440_RADIO_OFF1 : M7440_RADIO_ON1;
	61	u8 val2 = blocked ? M7440_RADIO_OFF2 : M7440_RADIO_ON2;
	62
	63	outb(val1, M7440_PORT1);
	64	outb(val2, M7440_PORT2);
65
66	/* Check whether the state has changed correctly */
67	if (inb(M7440_PORT1) != val1 \|\| inb(M7440_PORT2) != val2)
68	return -EIO;
69
70	return 0;
71	}
72
73	static const struct rfkill_ops amilo_m7440_rfkill_ops = {
74	.set_block = amilo_m7440_rfkill_set_block
75	};
76
b859f159	77	static const struct dmi_system_id amilo_rfkill_id_table[] = {
c215ab9a BH	78	{
	79	.matches = {
	80	DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
	81	DMI_MATCH(DMI_BOARD_NAME, "AMILO A1655"),
	82	},
	83	.driver_data = (void *)&amilo_a1655_rfkill_ops
	84	},
0be18a8e JM	85	{
	86	.matches = {
	87	DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
	88	DMI_MATCH(DMI_BOARD_NAME, "AMILO L1310"),
	89	},
	90	.driver_data = (void *)&amilo_a1655_rfkill_ops
	91	},
c215ab9a BH	92	{
	93	.matches = {
	94	DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
	95	DMI_MATCH(DMI_BOARD_NAME, "AMILO M7440"),
	96	},
	97	.driver_data = (void *)&amilo_m7440_rfkill_ops
	98	},
	99	{}
	100	};
	101
	102	static struct platform_device *amilo_rfkill_pdev;
	103	static struct rfkill *amilo_rfkill_dev;
	104
b859f159	105	static int amilo_rfkill_probe(struct platform_device *device)
c215ab9a	106	{
41603e97	107	int rc;
c215ab9a BH	108	const struct dmi_system_id *system_id =
c215ab9a BH	109	dmi_first_match(amilo_rfkill_id_table);
41603e97 JJ	110
	111	if (!system_id)
	112	return -ENXIO;
c215ab9a BH	113
	114	amilo_rfkill_dev = rfkill_alloc(KBUILD_MODNAME, &device->dev,
	115	RFKILL_TYPE_WLAN,
	116	system_id->driver_data, NULL);
	117	if (!amilo_rfkill_dev)
	118	return -ENOMEM;
	119
	120	rc = rfkill_register(amilo_rfkill_dev);
	121	if (rc)
	122	goto fail;
	123
	124	return 0;
	125
	126	fail:
	127	rfkill_destroy(amilo_rfkill_dev);
	128	return rc;
	129	}
	130
	131	static int amilo_rfkill_remove(struct platform_device *device)
	132	{
	133	rfkill_unregister(amilo_rfkill_dev);
	134	rfkill_destroy(amilo_rfkill_dev);
	135	return 0;
	136	}
	137
	138	static struct platform_driver amilo_rfkill_driver = {
	139	.driver = {
	140	.name = KBUILD_MODNAME,
c215ab9a BH	141	},
	142	.probe = amilo_rfkill_probe,
	143	.remove = amilo_rfkill_remove,
	144	};
	145
	146	static int __init amilo_rfkill_init(void)
	147	{
	148	int rc;
	149
	150	if (dmi_first_match(amilo_rfkill_id_table) == NULL)
	151	return -ENODEV;
	152
	153	rc = platform_driver_register(&amilo_rfkill_driver);
	154	if (rc)
	155	return rc;
	156
	157	amilo_rfkill_pdev = platform_device_register_simple(KBUILD_MODNAME, -1,
	158	NULL, 0);
	159	if (IS_ERR(amilo_rfkill_pdev)) {
	160	rc = PTR_ERR(amilo_rfkill_pdev);
	161	goto fail;
	162	}
	163
	164	return 0;
	165
	166	fail:
	167	platform_driver_unregister(&amilo_rfkill_driver);
	168	return rc;
	169	}
	170
	171	static void __exit amilo_rfkill_exit(void)
	172	{
	173	platform_device_unregister(amilo_rfkill_pdev);
	174	platform_driver_unregister(&amilo_rfkill_driver);
	175	}
	176
	177	MODULE_AUTHOR("Ben Hutchings <ben@decadent.org.uk>");
	178	MODULE_LICENSE("GPL");
	179	MODULE_DEVICE_TABLE(dmi, amilo_rfkill_id_table);
	180
	181	module_init(amilo_rfkill_init);
	182	module_exit(amilo_rfkill_exit);