tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
17MODULE_AUTHOR("Márton Németh <nm127@freemail.hu>");
18MODULE_DESCRIPTION("Clevo mail LED driver");
19MODULE_LICENSE("GPL");
20
21static unsigned int __initdata nodetect;
22module_param_named(nodetect, nodetect, bool, 0);
23MODULE_PARM_DESC(nodetect, "Skip DMI hardware detection");
24
25static struct platform_device *pdev;
26
27static 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 */
42static 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
93static 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
105static 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
141static 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
147static int __init clevo_mail_led_probe(struct platform_device *pdev)
148{
149 return led_classdev_register(&pdev->dev, &clevo_mail_led);
150}
151
152static 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
159static 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
166static 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
176static 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
187static 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
221static 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
229module_init(clevo_mail_led_init);
230module_exit(clevo_mail_led_exit);