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
amilo_a1655_rfkill_set_block(void * data,bool blocked)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(¶m, 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
amilo_m7440_rfkill_set_block(void * data,bool blocked)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
73 static 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
98 static struct platform_device *amilo_rfkill_pdev;
99 static struct rfkill *amilo_rfkill_dev;
100
amilo_rfkill_probe(struct platform_device * device)101 static 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
122 fail:
123 rfkill_destroy(amilo_rfkill_dev);
124 return rc;
125 }
126
amilo_rfkill_remove(struct platform_device * device)127 static void amilo_rfkill_remove(struct platform_device *device)
128 {
129 rfkill_unregister(amilo_rfkill_dev);
130 rfkill_destroy(amilo_rfkill_dev);
131 }
132
133 static struct platform_driver amilo_rfkill_driver = {
134 .driver = {
135 .name = KBUILD_MODNAME,
136 },
137 .probe = amilo_rfkill_probe,
138 .remove_new = amilo_rfkill_remove,
139 };
140
amilo_rfkill_init(void)141 static int __init amilo_rfkill_init(void)
142 {
143 int rc;
144
145 if (dmi_first_match(amilo_rfkill_id_table) == NULL)
146 return -ENODEV;
147
148 rc = platform_driver_register(&amilo_rfkill_driver);
149 if (rc)
150 return rc;
151
152 amilo_rfkill_pdev = platform_device_register_simple(KBUILD_MODNAME,
153 PLATFORM_DEVID_NONE,
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
amilo_rfkill_exit(void)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);
179