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("M�rton N�meth <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 D410V", 73 .matches = { 74 DMI_MATCH(DMI_BOARD_VENDOR, "Clevo, Co."), 75 DMI_MATCH(DMI_BOARD_NAME, "D400V/D470V"), 76 DMI_MATCH(DMI_BOARD_VERSION, "SS78B"), 77 DMI_MATCH(DMI_PRODUCT_VERSION, "Rev. A1") 78 } 79 }, 80 { } 81 }; 82 83 static void clevo_mail_led_set(struct led_classdev *led_cdev, 84 enum led_brightness value) 85 { 86 if (value == LED_OFF) 87 i8042_command(NULL, CLEVO_MAIL_LED_OFF); 88 else if (value <= LED_HALF) 89 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ); 90 else 91 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ); 92 93 } 94 95 static int clevo_mail_led_blink(struct led_classdev *led_cdev, 96 unsigned long* delay_on, 97 unsigned long* delay_off) 98 { 99 int status = -EINVAL; 100 101 if (*delay_on == 0 /* ms */ && *delay_off == 0 /* ms */) { 102 /* Special case: the leds subsystem requested us to 103 * chose one user friendly blinking of the LED, and 104 * start it. Let's blink the led slowly (0.5Hz). 105 */ 106 *delay_on = 1000; /* ms */ 107 *delay_off = 1000; /* ms */ 108 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ); 109 status = 0; 110 111 } else if (*delay_on == 500 /* ms */ && *delay_off == 500 /* ms */) { 112 /* blink the led with 1Hz */ 113 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ); 114 status = 0; 115 116 } else if (*delay_on == 1000 /* ms */ && *delay_off == 1000 /* ms */) { 117 /* blink the led with 0.5Hz */ 118 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ); 119 status = 0; 120 121 } else { 122 printk(KERN_DEBUG KBUILD_MODNAME 123 ": clevo_mail_led_blink(..., %lu, %lu)," 124 " returning -EINVAL (unsupported)\n", 125 *delay_on, *delay_off); 126 } 127 128 return status; 129 } 130 131 static struct led_classdev clevo_mail_led = { 132 .name = "clevo::mail", 133 .brightness_set = clevo_mail_led_set, 134 .blink_set = clevo_mail_led_blink, 135 }; 136 137 static int __init clevo_mail_led_probe(struct platform_device *pdev) 138 { 139 return led_classdev_register(&pdev->dev, &clevo_mail_led); 140 } 141 142 static int clevo_mail_led_remove(struct platform_device *pdev) 143 { 144 led_classdev_unregister(&clevo_mail_led); 145 return 0; 146 } 147 148 #ifdef CONFIG_PM 149 static int clevo_mail_led_suspend(struct platform_device *dev, 150 pm_message_t state) 151 { 152 led_classdev_suspend(&clevo_mail_led); 153 return 0; 154 } 155 156 static int clevo_mail_led_resume(struct platform_device *dev) 157 { 158 led_classdev_resume(&clevo_mail_led); 159 return 0; 160 } 161 #else 162 #define clevo_mail_led_suspend NULL 163 #define clevo_mail_led_resume NULL 164 #endif 165 166 static struct platform_driver clevo_mail_led_driver = { 167 .probe = clevo_mail_led_probe, 168 .remove = clevo_mail_led_remove, 169 .suspend = clevo_mail_led_suspend, 170 .resume = clevo_mail_led_resume, 171 .driver = { 172 .name = KBUILD_MODNAME, 173 .owner = THIS_MODULE, 174 }, 175 }; 176 177 static int __init clevo_mail_led_init(void) 178 { 179 int error = 0; 180 int count = 0; 181 182 /* Check with the help of DMI if we are running on supported hardware */ 183 if (!nodetect) { 184 count = dmi_check_system(mail_led_whitelist); 185 } else { 186 count = 1; 187 printk(KERN_ERR KBUILD_MODNAME ": Skipping DMI detection. " 188 "If the driver works on your hardware please " 189 "report model and the output of dmidecode in tracker " 190 "at http://sourceforge.net/projects/clevo-mailled/\n"); 191 } 192 193 if (!count) 194 return -ENODEV; 195 196 pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0); 197 if (!IS_ERR(pdev)) { 198 error = platform_driver_probe(&clevo_mail_led_driver, 199 clevo_mail_led_probe); 200 if (error) { 201 printk(KERN_ERR KBUILD_MODNAME 202 ": Can't probe platform driver\n"); 203 platform_device_unregister(pdev); 204 } 205 } else 206 error = PTR_ERR(pdev); 207 208 return error; 209 } 210 211 static void __exit clevo_mail_led_exit(void) 212 { 213 platform_device_unregister(pdev); 214 platform_driver_unregister(&clevo_mail_led_driver); 215 216 clevo_mail_led_set(NULL, LED_OFF); 217 } 218 219 module_init(clevo_mail_led_init); 220 module_exit(clevo_mail_led_exit); 221