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Sachin Kamat5c6f8442012-11-27 20:38:10 -08001#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
Márton Némethcec035d2007-10-31 11:46:41 +01002
3#include <linux/module.h>
4
5#include <linux/platform_device.h>
6#include <linux/err.h>
7#include <linux/leds.h>
8
9#include <linux/io.h>
10#include <linux/dmi.h>
11
12#include <linux/i8042.h>
13
14#define CLEVO_MAIL_LED_OFF 0x0084
15#define CLEVO_MAIL_LED_BLINK_1HZ 0x008A
16#define CLEVO_MAIL_LED_BLINK_0_5HZ 0x0083
17
Németh Márton4d404fd2008-03-09 20:59:57 +000018MODULE_AUTHOR("Márton Németh <nm127@freemail.hu>");
Márton Némethcec035d2007-10-31 11:46:41 +010019MODULE_DESCRIPTION("Clevo mail LED driver");
20MODULE_LICENSE("GPL");
21
Rusty Russell90ab5ee2012-01-13 09:32:20 +103022static bool __initdata nodetect;
Márton Némethcec035d2007-10-31 11:46:41 +010023module_param_named(nodetect, nodetect, bool, 0);
24MODULE_PARM_DESC(nodetect, "Skip DMI hardware detection");
25
26static struct platform_device *pdev;
27
28static int __init clevo_mail_led_dmi_callback(const struct dmi_system_id *id)
29{
Sachin Kamat5c6f8442012-11-27 20:38:10 -080030 pr_info("'%s' found\n", id->ident);
Márton Némethcec035d2007-10-31 11:46:41 +010031 return 1;
32}
33
34/*
Ondrej Zary96f09792012-08-02 05:04:46 +080035 * struct clevo_mail_led_dmi_table - List of known good models
Márton Némethcec035d2007-10-31 11:46:41 +010036 *
37 * Contains the known good models this driver is compatible with.
38 * When adding a new model try to be as strict as possible. This
39 * makes it possible to keep the false positives (the model is
40 * detected as working, but in reality it is not) as low as
41 * possible.
42 */
Ondrej Zary96f09792012-08-02 05:04:46 +080043static struct dmi_system_id __initdata clevo_mail_led_dmi_table[] = {
Márton Némethcec035d2007-10-31 11:46:41 +010044 {
45 .callback = clevo_mail_led_dmi_callback,
46 .ident = "Clevo D410J",
47 .matches = {
48 DMI_MATCH(DMI_SYS_VENDOR, "VIA"),
49 DMI_MATCH(DMI_PRODUCT_NAME, "K8N800"),
50 DMI_MATCH(DMI_PRODUCT_VERSION, "VT8204B")
51 }
52 },
53 {
54 .callback = clevo_mail_led_dmi_callback,
55 .ident = "Clevo M5x0N",
56 .matches = {
57 DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."),
58 DMI_MATCH(DMI_PRODUCT_NAME, "M5x0N")
59 }
60 },
61 {
62 .callback = clevo_mail_led_dmi_callback,
Ondrej Zaryee539a92012-08-02 05:04:56 +080063 .ident = "Clevo M5x0V",
Márton Némethcec035d2007-10-31 11:46:41 +010064 .matches = {
65 DMI_MATCH(DMI_BOARD_VENDOR, "CLEVO Co. "),
66 DMI_MATCH(DMI_BOARD_NAME, "M5X0V "),
Márton Némethcec035d2007-10-31 11:46:41 +010067 DMI_MATCH(DMI_PRODUCT_VERSION, "VT6198")
68 }
69 },
70 {
71 .callback = clevo_mail_led_dmi_callback,
Mrton Nmethb3ba31f2008-03-09 20:47:59 +000072 .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,
Márton Némethcec035d2007-10-31 11:46:41 +010082 .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};
Ondrej Zary96f09792012-08-02 05:04:46 +080092MODULE_DEVICE_TABLE(dmi, clevo_mail_led_dmi_table);
Márton Némethcec035d2007-10-31 11:46:41 +010093
94static void clevo_mail_led_set(struct led_classdev *led_cdev,
95 enum led_brightness value)
96{
Dmitry Torokhov181d6832009-09-16 01:06:43 -070097 i8042_lock_chip();
98
Márton Némethcec035d2007-10-31 11:46:41 +010099 if (value == LED_OFF)
100 i8042_command(NULL, CLEVO_MAIL_LED_OFF);
101 else if (value <= LED_HALF)
102 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
103 else
104 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);
105
Dmitry Torokhov181d6832009-09-16 01:06:43 -0700106 i8042_unlock_chip();
107
Márton Némethcec035d2007-10-31 11:46:41 +0100108}
109
Márton Németh92e015c2007-10-31 15:09:05 +0100110static int clevo_mail_led_blink(struct led_classdev *led_cdev,
Németh Márton4d404fd2008-03-09 20:59:57 +0000111 unsigned long *delay_on,
112 unsigned long *delay_off)
Márton Németh92e015c2007-10-31 15:09:05 +0100113{
114 int status = -EINVAL;
115
Dmitry Torokhov181d6832009-09-16 01:06:43 -0700116 i8042_lock_chip();
117
Márton Németh92e015c2007-10-31 15:09:05 +0100118 if (*delay_on == 0 /* ms */ && *delay_off == 0 /* ms */) {
119 /* Special case: the leds subsystem requested us to
120 * chose one user friendly blinking of the LED, and
121 * start it. Let's blink the led slowly (0.5Hz).
122 */
123 *delay_on = 1000; /* ms */
124 *delay_off = 1000; /* ms */
125 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
126 status = 0;
127
128 } else if (*delay_on == 500 /* ms */ && *delay_off == 500 /* ms */) {
129 /* blink the led with 1Hz */
130 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);
131 status = 0;
132
133 } else if (*delay_on == 1000 /* ms */ && *delay_off == 1000 /* ms */) {
134 /* blink the led with 0.5Hz */
135 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
136 status = 0;
137
138 } else {
Sachin Kamat5c6f8442012-11-27 20:38:10 -0800139 pr_debug("clevo_mail_led_blink(..., %lu, %lu),"
Márton Németh92e015c2007-10-31 15:09:05 +0100140 " returning -EINVAL (unsupported)\n",
141 *delay_on, *delay_off);
142 }
143
Dmitry Torokhov181d6832009-09-16 01:06:43 -0700144 i8042_unlock_chip();
145
Márton Németh92e015c2007-10-31 15:09:05 +0100146 return status;
147}
148
Márton Némethcec035d2007-10-31 11:46:41 +0100149static struct led_classdev clevo_mail_led = {
Richard Purdie6c152be2007-10-31 15:00:07 +0100150 .name = "clevo::mail",
Márton Némethcec035d2007-10-31 11:46:41 +0100151 .brightness_set = clevo_mail_led_set,
Márton Németh92e015c2007-10-31 15:09:05 +0100152 .blink_set = clevo_mail_led_blink,
Richard Purdie859cb7f2009-01-08 17:55:03 +0000153 .flags = LED_CORE_SUSPENDRESUME,
Márton Némethcec035d2007-10-31 11:46:41 +0100154};
155
Bill Pemberton98ea1ea2012-11-19 13:23:02 -0500156static int clevo_mail_led_probe(struct platform_device *pdev)
Márton Némethcec035d2007-10-31 11:46:41 +0100157{
158 return led_classdev_register(&pdev->dev, &clevo_mail_led);
159}
160
161static int clevo_mail_led_remove(struct platform_device *pdev)
162{
163 led_classdev_unregister(&clevo_mail_led);
164 return 0;
165}
166
Márton Némethcec035d2007-10-31 11:46:41 +0100167static struct platform_driver clevo_mail_led_driver = {
168 .probe = clevo_mail_led_probe,
169 .remove = clevo_mail_led_remove,
Márton Némethcec035d2007-10-31 11:46:41 +0100170 .driver = {
171 .name = KBUILD_MODNAME,
Kay Sievers3c4ded92008-04-15 14:34:30 -0700172 .owner = THIS_MODULE,
Márton Némethcec035d2007-10-31 11:46:41 +0100173 },
174};
175
176static int __init clevo_mail_led_init(void)
177{
178 int error = 0;
179 int count = 0;
180
181 /* Check with the help of DMI if we are running on supported hardware */
182 if (!nodetect) {
Ondrej Zary96f09792012-08-02 05:04:46 +0800183 count = dmi_check_system(clevo_mail_led_dmi_table);
Márton Némethcec035d2007-10-31 11:46:41 +0100184 } else {
185 count = 1;
Sachin Kamat5c6f8442012-11-27 20:38:10 -0800186 pr_err("Skipping DMI detection. "
Márton Némethcec035d2007-10-31 11:46:41 +0100187 "If the driver works on your hardware please "
188 "report model and the output of dmidecode in tracker "
189 "at http://sourceforge.net/projects/clevo-mailled/\n");
190 }
191
192 if (!count)
193 return -ENODEV;
194
195 pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
196 if (!IS_ERR(pdev)) {
197 error = platform_driver_probe(&clevo_mail_led_driver,
198 clevo_mail_led_probe);
199 if (error) {
Sachin Kamat5c6f8442012-11-27 20:38:10 -0800200 pr_err("Can't probe platform driver\n");
Márton Némethcec035d2007-10-31 11:46:41 +0100201 platform_device_unregister(pdev);
202 }
203 } else
204 error = PTR_ERR(pdev);
205
206 return error;
207}
208
209static void __exit clevo_mail_led_exit(void)
210{
211 platform_device_unregister(pdev);
212 platform_driver_unregister(&clevo_mail_led_driver);
213
214 clevo_mail_led_set(NULL, LED_OFF);
215}
216
217module_init(clevo_mail_led_init);
218module_exit(clevo_mail_led_exit);