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 bool __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 clevo_mail_led_dmi_table - 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 clevo_mail_led_dmi_table[] = { 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 = "Clevo M5x0V", 63 .matches = { 64 DMI_MATCH(DMI_BOARD_VENDOR, "CLEVO Co. "), 65 DMI_MATCH(DMI_BOARD_NAME, "M5X0V "), 66 DMI_MATCH(DMI_PRODUCT_VERSION, "VT6198") 67 } 68 }, 69 { 70 .callback = clevo_mail_led_dmi_callback, 71 .ident = "Clevo D400P", 72 .matches = { 73 DMI_MATCH(DMI_BOARD_VENDOR, "Clevo"), 74 DMI_MATCH(DMI_BOARD_NAME, "D400P"), 75 DMI_MATCH(DMI_BOARD_VERSION, "Rev.A"), 76 DMI_MATCH(DMI_PRODUCT_VERSION, "0106") 77 } 78 }, 79 { 80 .callback = clevo_mail_led_dmi_callback, 81 .ident = "Clevo D410V", 82 .matches = { 83 DMI_MATCH(DMI_BOARD_VENDOR, "Clevo, Co."), 84 DMI_MATCH(DMI_BOARD_NAME, "D400V/D470V"), 85 DMI_MATCH(DMI_BOARD_VERSION, "SS78B"), 86 DMI_MATCH(DMI_PRODUCT_VERSION, "Rev. A1") 87 } 88 }, 89 { } 90 }; 91 MODULE_DEVICE_TABLE(dmi, clevo_mail_led_dmi_table); 92 93 static void clevo_mail_led_set(struct led_classdev *led_cdev, 94 enum led_brightness value) 95 { 96 i8042_lock_chip(); 97 98 if (value == LED_OFF) 99 i8042_command(NULL, CLEVO_MAIL_LED_OFF); 100 else if (value <= LED_HALF) 101 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ); 102 else 103 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ); 104 105 i8042_unlock_chip(); 106 107 } 108 109 static int clevo_mail_led_blink(struct led_classdev *led_cdev, 110 unsigned long *delay_on, 111 unsigned long *delay_off) 112 { 113 int status = -EINVAL; 114 115 i8042_lock_chip(); 116 117 if (*delay_on == 0 /* ms */ && *delay_off == 0 /* ms */) { 118 /* Special case: the leds subsystem requested us to 119 * chose one user friendly blinking of the LED, and 120 * start it. Let's blink the led slowly (0.5Hz). 121 */ 122 *delay_on = 1000; /* ms */ 123 *delay_off = 1000; /* ms */ 124 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ); 125 status = 0; 126 127 } else if (*delay_on == 500 /* ms */ && *delay_off == 500 /* ms */) { 128 /* blink the led with 1Hz */ 129 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ); 130 status = 0; 131 132 } else if (*delay_on == 1000 /* ms */ && *delay_off == 1000 /* ms */) { 133 /* blink the led with 0.5Hz */ 134 i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ); 135 status = 0; 136 137 } else { 138 printk(KERN_DEBUG KBUILD_MODNAME 139 ": clevo_mail_led_blink(..., %lu, %lu)," 140 " returning -EINVAL (unsupported)\n", 141 *delay_on, *delay_off); 142 } 143 144 i8042_unlock_chip(); 145 146 return status; 147 } 148 149 static struct led_classdev clevo_mail_led = { 150 .name = "clevo::mail", 151 .brightness_set = clevo_mail_led_set, 152 .blink_set = clevo_mail_led_blink, 153 .flags = LED_CORE_SUSPENDRESUME, 154 }; 155 156 static int clevo_mail_led_probe(struct platform_device *pdev) 157 { 158 return led_classdev_register(&pdev->dev, &clevo_mail_led); 159 } 160 161 static int clevo_mail_led_remove(struct platform_device *pdev) 162 { 163 led_classdev_unregister(&clevo_mail_led); 164 return 0; 165 } 166 167 static struct platform_driver clevo_mail_led_driver = { 168 .probe = clevo_mail_led_probe, 169 .remove = clevo_mail_led_remove, 170 .driver = { 171 .name = KBUILD_MODNAME, 172 .owner = THIS_MODULE, 173 }, 174 }; 175 176 static 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) { 183 count = dmi_check_system(clevo_mail_led_dmi_table); 184 } else { 185 count = 1; 186 printk(KERN_ERR KBUILD_MODNAME ": Skipping DMI detection. " 187 "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) { 200 printk(KERN_ERR KBUILD_MODNAME 201 ": Can't probe platform driver\n"); 202 platform_device_unregister(pdev); 203 } 204 } else 205 error = PTR_ERR(pdev); 206 207 return error; 208 } 209 210 static void __exit clevo_mail_led_exit(void) 211 { 212 platform_device_unregister(pdev); 213 platform_driver_unregister(&clevo_mail_led_driver); 214 215 clevo_mail_led_set(NULL, LED_OFF); 216 } 217 218 module_init(clevo_mail_led_init); 219 module_exit(clevo_mail_led_exit); 220