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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h> #include <linux/platform_device.h> #include <linux/err.h> #include <linux/leds.h> #include <linux/io.h> #include <linux/dmi.h> #include <linux/i8042.h> #define CLEVO_MAIL_LED_OFF 0x0084 #define CLEVO_MAIL_LED_BLINK_1HZ 0x008A #define CLEVO_MAIL_LED_BLINK_0_5HZ 0x0083 MODULE_AUTHOR("Márton Németh <nm127@freemail.hu>"); MODULE_DESCRIPTION("Clevo mail LED driver"); MODULE_LICENSE("GPL"); static bool nodetect; module_param_named(nodetect, nodetect, bool, 0); MODULE_PARM_DESC(nodetect, "Skip DMI hardware detection"); static struct platform_device *pdev; static int __init clevo_mail_led_dmi_callback(const struct dmi_system_id *id) { pr_info("'%s' found\n", id->ident); return 1; } /* * struct clevo_mail_led_dmi_table - List of known good models * * Contains the known good models this driver is compatible with. * When adding a new model try to be as strict as possible. This * makes it possible to keep the false positives (the model is * detected as working, but in reality it is not) as low as * possible. */ static struct dmi_system_id clevo_mail_led_dmi_table[] __initdata = { { .callback = clevo_mail_led_dmi_callback, .ident = "Clevo D410J", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "VIA"), DMI_MATCH(DMI_PRODUCT_NAME, "K8N800"), DMI_MATCH(DMI_PRODUCT_VERSION, "VT8204B") } }, { .callback = clevo_mail_led_dmi_callback, .ident = "Clevo M5x0N", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."), DMI_MATCH(DMI_PRODUCT_NAME, "M5x0N") } }, { .callback = clevo_mail_led_dmi_callback, .ident = "Clevo M5x0V", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "CLEVO Co. "), DMI_MATCH(DMI_BOARD_NAME, "M5X0V "), DMI_MATCH(DMI_PRODUCT_VERSION, "VT6198") } }, { .callback = clevo_mail_led_dmi_callback, .ident = "Clevo D400P", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "Clevo"), DMI_MATCH(DMI_BOARD_NAME, "D400P"), DMI_MATCH(DMI_BOARD_VERSION, "Rev.A"), DMI_MATCH(DMI_PRODUCT_VERSION, "0106") } }, { .callback = clevo_mail_led_dmi_callback, .ident = "Clevo D410V", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "Clevo, Co."), DMI_MATCH(DMI_BOARD_NAME, "D400V/D470V"), DMI_MATCH(DMI_BOARD_VERSION, "SS78B"), DMI_MATCH(DMI_PRODUCT_VERSION, "Rev. A1") } }, { } }; MODULE_DEVICE_TABLE(dmi, clevo_mail_led_dmi_table); static void clevo_mail_led_set(struct led_classdev *led_cdev, enum led_brightness value) { i8042_lock_chip(); if (value == LED_OFF) i8042_command(NULL, CLEVO_MAIL_LED_OFF); else if (value <= LED_HALF) i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ); else i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ); i8042_unlock_chip(); } static int clevo_mail_led_blink(struct led_classdev *led_cdev, unsigned long *delay_on, unsigned long *delay_off) { int status = -EINVAL; i8042_lock_chip(); if (*delay_on == 0 /* ms */ && *delay_off == 0 /* ms */) { /* Special case: the leds subsystem requested us to * chose one user friendly blinking of the LED, and * start it. Let's blink the led slowly (0.5Hz). */ *delay_on = 1000; /* ms */ *delay_off = 1000; /* ms */ i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ); status = 0; } else if (*delay_on == 500 /* ms */ && *delay_off == 500 /* ms */) { /* blink the led with 1Hz */ i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ); status = 0; } else if (*delay_on == 1000 /* ms */ && *delay_off == 1000 /* ms */) { /* blink the led with 0.5Hz */ i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ); status = 0; } else { pr_debug("clevo_mail_led_blink(..., %lu, %lu)," " returning -EINVAL (unsupported)\n", *delay_on, *delay_off); } i8042_unlock_chip(); return status; } static struct led_classdev clevo_mail_led = { .name = "clevo::mail", .brightness_set = clevo_mail_led_set, .blink_set = clevo_mail_led_blink, .flags = LED_CORE_SUSPENDRESUME, }; static int __init clevo_mail_led_probe(struct platform_device *pdev) { return led_classdev_register(&pdev->dev, &clevo_mail_led); } static int clevo_mail_led_remove(struct platform_device *pdev) { led_classdev_unregister(&clevo_mail_led); return 0; } static struct platform_driver clevo_mail_led_driver = { .remove = clevo_mail_led_remove, .driver = { .name = KBUILD_MODNAME, }, }; static int __init clevo_mail_led_init(void) { int error = 0; int count = 0; /* Check with the help of DMI if we are running on supported hardware */ if (!nodetect) { count = dmi_check_system(clevo_mail_led_dmi_table); } else { count = 1; pr_err("Skipping DMI detection. " "If the driver works on your hardware please " "report model and the output of dmidecode in tracker " "at http://sourceforge.net/projects/clevo-mailled/\n"); } if (!count) return -ENODEV; pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0); if (!IS_ERR(pdev)) { error = platform_driver_probe(&clevo_mail_led_driver, clevo_mail_led_probe); if (error) { pr_err("Can't probe platform driver\n"); platform_device_unregister(pdev); } } else error = PTR_ERR(pdev); return error; } static void __exit clevo_mail_led_exit(void) { platform_device_unregister(pdev); platform_driver_unregister(&clevo_mail_led_driver); clevo_mail_led_set(NULL, LED_OFF); } module_init(clevo_mail_led_init); module_exit(clevo_mail_led_exit); |