cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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amilo-rfkill.c (4164B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      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.
     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
     28static 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
     39static 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
     54static 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
     69static const struct rfkill_ops amilo_m7440_rfkill_ops = {
     70	.set_block = amilo_m7440_rfkill_set_block
     71};
     72
     73static const struct dmi_system_id amilo_rfkill_id_table[] = {
     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	},
     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	},
     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
     98static struct platform_device *amilo_rfkill_pdev;
     99static struct rfkill *amilo_rfkill_dev;
    100
    101static int amilo_rfkill_probe(struct platform_device *device)
    102{
    103	int rc;
    104	const struct dmi_system_id *system_id =
    105		dmi_first_match(amilo_rfkill_id_table);
    106
    107	if (!system_id)
    108		return -ENXIO;
    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
    122fail:
    123	rfkill_destroy(amilo_rfkill_dev);
    124	return rc;
    125}
    126
    127static 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
    134static struct platform_driver amilo_rfkill_driver = {
    135	.driver = {
    136		.name	= KBUILD_MODNAME,
    137	},
    138	.probe	= amilo_rfkill_probe,
    139	.remove	= amilo_rfkill_remove,
    140};
    141
    142static 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
    162fail:
    163	platform_driver_unregister(&amilo_rfkill_driver);
    164	return rc;
    165}
    166
    167static void __exit amilo_rfkill_exit(void)
    168{
    169	platform_device_unregister(amilo_rfkill_pdev);
    170	platform_driver_unregister(&amilo_rfkill_driver);
    171}
    172
    173MODULE_AUTHOR("Ben Hutchings <ben@decadent.org.uk>");
    174MODULE_LICENSE("GPL");
    175MODULE_DEVICE_TABLE(dmi, amilo_rfkill_id_table);
    176
    177module_init(amilo_rfkill_init);
    178module_exit(amilo_rfkill_exit);