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
amilo_a1655_rfkill_set_block(void * data,bool blocked)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(¶m, 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
amilo_m7440_rfkill_set_block(void * data,bool blocked)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
77 static const struct dmi_system_id __devinitdata amilo_rfkill_id_table[] = {
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 },
85 {
86 .matches = {
87 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
88 DMI_MATCH(DMI_BOARD_NAME, "AMILO M7440"),
89 },
90 .driver_data = (void *)&amilo_m7440_rfkill_ops
91 },
92 {}
93 };
94
95 static struct platform_device *amilo_rfkill_pdev;
96 static struct rfkill *amilo_rfkill_dev;
97
amilo_rfkill_probe(struct platform_device * device)98 static int __devinit amilo_rfkill_probe(struct platform_device *device)
99 {
100 const struct dmi_system_id *system_id =
101 dmi_first_match(amilo_rfkill_id_table);
102 int rc;
103
104 amilo_rfkill_dev = rfkill_alloc(KBUILD_MODNAME, &device->dev,
105 RFKILL_TYPE_WLAN,
106 system_id->driver_data, NULL);
107 if (!amilo_rfkill_dev)
108 return -ENOMEM;
109
110 rc = rfkill_register(amilo_rfkill_dev);
111 if (rc)
112 goto fail;
113
114 return 0;
115
116 fail:
117 rfkill_destroy(amilo_rfkill_dev);
118 return rc;
119 }
120
amilo_rfkill_remove(struct platform_device * device)121 static int amilo_rfkill_remove(struct platform_device *device)
122 {
123 rfkill_unregister(amilo_rfkill_dev);
124 rfkill_destroy(amilo_rfkill_dev);
125 return 0;
126 }
127
128 static struct platform_driver amilo_rfkill_driver = {
129 .driver = {
130 .name = KBUILD_MODNAME,
131 .owner = THIS_MODULE,
132 },
133 .probe = amilo_rfkill_probe,
134 .remove = amilo_rfkill_remove,
135 };
136
amilo_rfkill_init(void)137 static int __init amilo_rfkill_init(void)
138 {
139 int rc;
140
141 if (dmi_first_match(amilo_rfkill_id_table) == NULL)
142 return -ENODEV;
143
144 rc = platform_driver_register(&amilo_rfkill_driver);
145 if (rc)
146 return rc;
147
148 amilo_rfkill_pdev = platform_device_register_simple(KBUILD_MODNAME, -1,
149 NULL, 0);
150 if (IS_ERR(amilo_rfkill_pdev)) {
151 rc = PTR_ERR(amilo_rfkill_pdev);
152 goto fail;
153 }
154
155 return 0;
156
157 fail:
158 platform_driver_unregister(&amilo_rfkill_driver);
159 return rc;
160 }
161
amilo_rfkill_exit(void)162 static void __exit amilo_rfkill_exit(void)
163 {
164 platform_device_unregister(amilo_rfkill_pdev);
165 platform_driver_unregister(&amilo_rfkill_driver);
166 }
167
168 MODULE_AUTHOR("Ben Hutchings <ben@decadent.org.uk>");
169 MODULE_LICENSE("GPL");
170 MODULE_DEVICE_TABLE(dmi, amilo_rfkill_id_table);
171
172 module_init(amilo_rfkill_init);
173 module_exit(amilo_rfkill_exit);
174