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1 | ||
2 | #include <linux/module.h> | |
3 | ||
4 | #include <linux/platform_device.h> | |
5 | #include <linux/err.h> | |
6 | #include <linux/leds.h> | |
7 | ||
8 | #include <linux/io.h> | |
9 | #include <linux/dmi.h> | |
10 | ||
11 | #include <linux/i8042.h> | |
12 | ||
13 | #define CLEVO_MAIL_LED_OFF 0x0084 | |
14 | #define CLEVO_MAIL_LED_BLINK_1HZ 0x008A | |
15 | #define CLEVO_MAIL_LED_BLINK_0_5HZ 0x0083 | |
16 | ||
17 | MODULE_AUTHOR("Márton Németh <nm127@freemail.hu>"); | |
18 | MODULE_DESCRIPTION("Clevo mail LED driver"); | |
19 | MODULE_LICENSE("GPL"); | |
20 | ||
21 | static unsigned int __initdata nodetect; | |
22 | module_param_named(nodetect, nodetect, bool, 0); | |
23 | MODULE_PARM_DESC(nodetect, "Skip DMI hardware detection"); | |
24 | ||
25 | static struct platform_device *pdev; | |
26 | ||
27 | static int __init clevo_mail_led_dmi_callback(const struct dmi_system_id *id) | |
28 | { | |
29 | printk(KERN_INFO KBUILD_MODNAME ": '%s' found\n", id->ident); | |
30 | return 1; | |
31 | } | |
32 | ||
33 | /* | |
34 | * struct mail_led_whitelist - List of known good models | |
35 | * | |
36 | * Contains the known good models this driver is compatible with. | |
37 | * When adding a new model try to be as strict as possible. This | |
38 | * makes it possible to keep the false positives (the model is | |
39 | * detected as working, but in reality it is not) as low as | |
40 | * possible. | |
41 | */ | |
42 | static struct dmi_system_id __initdata mail_led_whitelist[] = { | |
43 | { | |
44 | .callback = clevo_mail_led_dmi_callback, | |
45 | .ident = "Clevo D410J", | |
46 | .matches = { | |
47 | DMI_MATCH(DMI_SYS_VENDOR, "VIA"), | |
48 | DMI_MATCH(DMI_PRODUCT_NAME, "K8N800"), | |
49 | DMI_MATCH(DMI_PRODUCT_VERSION, "VT8204B") | |
50 | } | |
51 | }, | |
52 | { | |
53 | .callback = clevo_mail_led_dmi_callback, | |
54 | .ident = "Clevo M5x0N", | |
55 | .matches = { | |
56 | DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."), | |
57 | DMI_MATCH(DMI_PRODUCT_NAME, "M5x0N") | |
58 | } | |
59 | }, | |
60 | { | |
61 | .callback = clevo_mail_led_dmi_callback, | |
62 | .ident = "Positivo Mobile", | |
63 | .matches = { | |
64 | DMI_MATCH(DMI_BOARD_VENDOR, "CLEVO Co. "), | |
65 | DMI_MATCH(DMI_BOARD_NAME, "M5X0V "), | |
66 | DMI_MATCH(DMI_PRODUCT_NAME, "Positivo Mobile"), | |
67 | DMI_MATCH(DMI_PRODUCT_VERSION, "VT6198") | |
68 | } | |
69 | }, | |
70 | { | |
71 | .callback = clevo_mail_led_dmi_callback, | |
72 | .ident = "Clevo D400P", | |
73 | .matches = { | |
74 | DMI_MATCH(DMI_BOARD_VENDOR, "Clevo"), | |
75 | DMI_MATCH(DMI_BOARD_NAME, "D400P"), | |
76 | DMI_MATCH(DMI_BOARD_VERSION, "Rev.A"), | |
77 | DMI_MATCH(DMI_PRODUCT_VERSION, "0106") | |
78 | } | |
79 | }, | |
80 | { | |
81 | .callback = clevo_mail_led_dmi_callback, | |
82 | .ident = "Clevo D410V", | |
83 | .matches = { | |
84 | DMI_MATCH(DMI_BOARD_VENDOR, "Clevo, Co."), | |
85 | DMI_MATCH(DMI_BOARD_NAME, "D400V/D470V"), | |
86 | DMI_MATCH(DMI_BOARD_VERSION, "SS78B"), | |
87 | DMI_MATCH(DMI_PRODUCT_VERSION, "Rev. A1") | |
88 | } | |
89 | }, | |
90 | { } | |
91 | }; | |
92 | ||
93 | static void clevo_mail_led_set(struct led_classdev *led_cdev, | |
94 | enum led_brightness value) | |
95 | { | |
96 | if (value == LED_OFF) | |
97 | i8042_command(NULL, CLEVO_MAIL_LED_OFF); | |
98 | else if (value <= LED_HALF) | |
99 | i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ); | |
100 | else | |
101 | i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ); | |
102 | ||
103 | } | |
104 | ||
105 | static int clevo_mail_led_blink(struct led_classdev *led_cdev, | |
106 | unsigned long *delay_on, | |
107 | unsigned long *delay_off) | |
108 | { | |
109 | int status = -EINVAL; | |
110 | ||
111 | if (*delay_on == 0 /* ms */ && *delay_off == 0 /* ms */) { | |
112 | /* Special case: the leds subsystem requested us to | |
113 | * chose one user friendly blinking of the LED, and | |
114 | * start it. Let's blink the led slowly (0.5Hz). | |
115 | */ | |
116 | *delay_on = 1000; /* ms */ | |
117 | *delay_off = 1000; /* ms */ | |
118 | i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ); | |
119 | status = 0; | |
120 | ||
121 | } else if (*delay_on == 500 /* ms */ && *delay_off == 500 /* ms */) { | |
122 | /* blink the led with 1Hz */ | |
123 | i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ); | |
124 | status = 0; | |
125 | ||
126 | } else if (*delay_on == 1000 /* ms */ && *delay_off == 1000 /* ms */) { | |
127 | /* blink the led with 0.5Hz */ | |
128 | i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ); | |
129 | status = 0; | |
130 | ||
131 | } else { | |
132 | printk(KERN_DEBUG KBUILD_MODNAME | |
133 | ": clevo_mail_led_blink(..., %lu, %lu)," | |
134 | " returning -EINVAL (unsupported)\n", | |
135 | *delay_on, *delay_off); | |
136 | } | |
137 | ||
138 | return status; | |
139 | } | |
140 | ||
141 | static struct led_classdev clevo_mail_led = { | |
142 | .name = "clevo::mail", | |
143 | .brightness_set = clevo_mail_led_set, | |
144 | .blink_set = clevo_mail_led_blink, | |
145 | }; | |
146 | ||
147 | static int __init clevo_mail_led_probe(struct platform_device *pdev) | |
148 | { | |
149 | return led_classdev_register(&pdev->dev, &clevo_mail_led); | |
150 | } | |
151 | ||
152 | static int clevo_mail_led_remove(struct platform_device *pdev) | |
153 | { | |
154 | led_classdev_unregister(&clevo_mail_led); | |
155 | return 0; | |
156 | } | |
157 | ||
158 | #ifdef CONFIG_PM | |
159 | static int clevo_mail_led_suspend(struct platform_device *dev, | |
160 | pm_message_t state) | |
161 | { | |
162 | led_classdev_suspend(&clevo_mail_led); | |
163 | return 0; | |
164 | } | |
165 | ||
166 | static int clevo_mail_led_resume(struct platform_device *dev) | |
167 | { | |
168 | led_classdev_resume(&clevo_mail_led); | |
169 | return 0; | |
170 | } | |
171 | #else | |
172 | #define clevo_mail_led_suspend NULL | |
173 | #define clevo_mail_led_resume NULL | |
174 | #endif | |
175 | ||
176 | static struct platform_driver clevo_mail_led_driver = { | |
177 | .probe = clevo_mail_led_probe, | |
178 | .remove = clevo_mail_led_remove, | |
179 | .suspend = clevo_mail_led_suspend, | |
180 | .resume = clevo_mail_led_resume, | |
181 | .driver = { | |
182 | .name = KBUILD_MODNAME, | |
183 | .owner = THIS_MODULE, | |
184 | }, | |
185 | }; | |
186 | ||
187 | static int __init clevo_mail_led_init(void) | |
188 | { | |
189 | int error = 0; | |
190 | int count = 0; | |
191 | ||
192 | /* Check with the help of DMI if we are running on supported hardware */ | |
193 | if (!nodetect) { | |
194 | count = dmi_check_system(mail_led_whitelist); | |
195 | } else { | |
196 | count = 1; | |
197 | printk(KERN_ERR KBUILD_MODNAME ": Skipping DMI detection. " | |
198 | "If the driver works on your hardware please " | |
199 | "report model and the output of dmidecode in tracker " | |
200 | "at http://sourceforge.net/projects/clevo-mailled/\n"); | |
201 | } | |
202 | ||
203 | if (!count) | |
204 | return -ENODEV; | |
205 | ||
206 | pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0); | |
207 | if (!IS_ERR(pdev)) { | |
208 | error = platform_driver_probe(&clevo_mail_led_driver, | |
209 | clevo_mail_led_probe); | |
210 | if (error) { | |
211 | printk(KERN_ERR KBUILD_MODNAME | |
212 | ": Can't probe platform driver\n"); | |
213 | platform_device_unregister(pdev); | |
214 | } | |
215 | } else | |
216 | error = PTR_ERR(pdev); | |
217 | ||
218 | return error; | |
219 | } | |
220 | ||
221 | static void __exit clevo_mail_led_exit(void) | |
222 | { | |
223 | platform_device_unregister(pdev); | |
224 | platform_driver_unregister(&clevo_mail_led_driver); | |
225 | ||
226 | clevo_mail_led_set(NULL, LED_OFF); | |
227 | } | |
228 | ||
229 | module_init(clevo_mail_led_init); | |
230 | module_exit(clevo_mail_led_exit); |