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

// 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(&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
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
c215ab9a BH	2	/*
	3	* Support for rfkill on some Fujitsu-Siemens Amilo laptops.
	4	* Copyright 2011 Ben Hutchings.
	5	*
	6	* Based in part on the fsam7440 driver, which is:
	7	* Copyright 2005 Alejandro Vidal Mata & Javier Vidal Mata.
	8	* and on the fsaa1655g driver, which is:
	9	* Copyright 2006 Martin Večeřa.
c215ab9a BH	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/dmi.h>
	14	#include <linux/i8042.h>
	15	#include <linux/io.h>
	16	#include <linux/moduleparam.h>
	17	#include <linux/platform_device.h>
	18	#include <linux/rfkill.h>
	19
	20	/*
	21	* These values were obtained from disassembling and debugging the
	22	* PM.exe program installed in the Fujitsu-Siemens AMILO A1655G
	23	*/
	24	#define A1655_WIFI_COMMAND 0x10C5
	25	#define A1655_WIFI_ON 0x25
	26	#define A1655_WIFI_OFF 0x45
	27
	28	static int amilo_a1655_rfkill_set_block(void *data, bool blocked)
	29	{
	30	u8 param = blocked ? A1655_WIFI_OFF : A1655_WIFI_ON;
	31	int rc;
	32
	33	i8042_lock_chip();
	34	rc = i8042_command(&param, A1655_WIFI_COMMAND);
	35	i8042_unlock_chip();
	36	return rc;
	37	}
	38
	39	static const struct rfkill_ops amilo_a1655_rfkill_ops = {
	40	.set_block = amilo_a1655_rfkill_set_block
	41	};
	42
	43	/*
	44	* These values were obtained from disassembling the PM.exe program
	45	* installed in the Fujitsu-Siemens AMILO M 7440
	46	*/
	47	#define M7440_PORT1 0x118f
	48	#define M7440_PORT2 0x118e
	49	#define M7440_RADIO_ON1 0x12
	50	#define M7440_RADIO_ON2 0x80
	51	#define M7440_RADIO_OFF1 0x10
	52	#define M7440_RADIO_OFF2 0x00
	53
	54	static int amilo_m7440_rfkill_set_block(void *data, bool blocked)
	55	{
	56	u8 val1 = blocked ? M7440_RADIO_OFF1 : M7440_RADIO_ON1;
	57	u8 val2 = blocked ? M7440_RADIO_OFF2 : M7440_RADIO_ON2;
	58
	59	outb(val1, M7440_PORT1);
	60	outb(val2, M7440_PORT2);
	61
	62	/* Check whether the state has changed correctly */
	63	if (inb(M7440_PORT1) != val1 \|\| inb(M7440_PORT2) != val2)
	64	return -EIO;
	65
	66	return 0;
	67	}
	68
	69	static const struct rfkill_ops amilo_m7440_rfkill_ops = {
	70	.set_block = amilo_m7440_rfkill_set_block
	71	};
	72
b859f159	73	static const struct dmi_system_id amilo_rfkill_id_table[] = {
c215ab9a BH	74	{
	75	.matches = {
	76	DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
	77	DMI_MATCH(DMI_BOARD_NAME, "AMILO A1655"),
	78	},
	79	.driver_data = (void *)&amilo_a1655_rfkill_ops
	80	},
0be18a8e JM	81	{
	82	.matches = {
	83	DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
	84	DMI_MATCH(DMI_BOARD_NAME, "AMILO L1310"),
	85	},
	86	.driver_data = (void *)&amilo_a1655_rfkill_ops
	87	},
c215ab9a BH	88	{
	89	.matches = {
	90	DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
	91	DMI_MATCH(DMI_BOARD_NAME, "AMILO M7440"),
	92	},
	93	.driver_data = (void *)&amilo_m7440_rfkill_ops
	94	},
	95	{}
	96	};
	97
	98	static struct platform_device *amilo_rfkill_pdev;
	99	static struct rfkill *amilo_rfkill_dev;
	100
b859f159	101	static int amilo_rfkill_probe(struct platform_device *device)
c215ab9a	102	{
41603e97	103	int rc;
c215ab9a BH	104	const struct dmi_system_id *system_id =
c215ab9a BH	105	dmi_first_match(amilo_rfkill_id_table);
41603e97 JJ	106
	107	if (!system_id)
	108	return -ENXIO;
c215ab9a BH	109
	110	amilo_rfkill_dev = rfkill_alloc(KBUILD_MODNAME, &device->dev,
	111	RFKILL_TYPE_WLAN,
	112	system_id->driver_data, NULL);
	113	if (!amilo_rfkill_dev)
	114	return -ENOMEM;
	115
	116	rc = rfkill_register(amilo_rfkill_dev);
	117	if (rc)
	118	goto fail;
	119
	120	return 0;
	121
	122	fail:
	123	rfkill_destroy(amilo_rfkill_dev);
	124	return rc;
	125	}
	126
	127	static int amilo_rfkill_remove(struct platform_device *device)
	128	{
	129	rfkill_unregister(amilo_rfkill_dev);
	130	rfkill_destroy(amilo_rfkill_dev);
	131	return 0;
	132	}
	133
	134	static struct platform_driver amilo_rfkill_driver = {
	135	.driver = {
	136	.name = KBUILD_MODNAME,
c215ab9a BH	137	},
	138	.probe = amilo_rfkill_probe,
	139	.remove = amilo_rfkill_remove,
	140	};
	141
	142	static int __init amilo_rfkill_init(void)
	143	{
	144	int rc;
	145
	146	if (dmi_first_match(amilo_rfkill_id_table) == NULL)
	147	return -ENODEV;
	148
	149	rc = platform_driver_register(&amilo_rfkill_driver);
	150	if (rc)
	151	return rc;
	152
	153	amilo_rfkill_pdev = platform_device_register_simple(KBUILD_MODNAME, -1,
	154	NULL, 0);
	155	if (IS_ERR(amilo_rfkill_pdev)) {
	156	rc = PTR_ERR(amilo_rfkill_pdev);
	157	goto fail;
	158	}
	159
	160	return 0;
	161
	162	fail:
	163	platform_driver_unregister(&amilo_rfkill_driver);
	164	return rc;
	165	}
	166
	167	static void __exit amilo_rfkill_exit(void)
	168	{
	169	platform_device_unregister(amilo_rfkill_pdev);
	170	platform_driver_unregister(&amilo_rfkill_driver);
	171	}
	172
	173	MODULE_AUTHOR("Ben Hutchings <ben@decadent.org.uk>");
	174	MODULE_LICENSE("GPL");
	175	MODULE_DEVICE_TABLE(dmi, amilo_rfkill_id_table);
	176
	177	module_init(amilo_rfkill_init);
	178	module_exit(amilo_rfkill_exit);