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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(¶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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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); |