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| 1 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 2 | |
| 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 | |
| 18 | MODULE_AUTHOR("Márton Németh <nm127@freemail.hu>"); |
| 19 | MODULE_DESCRIPTION("Clevo mail LED driver"); |
| 20 | MODULE_LICENSE("GPL"); |
| 21 | |
| 22 | static bool __initdata nodetect; |
| 23 | module_param_named(nodetect, nodetect, bool, 0); |
| 24 | MODULE_PARM_DESC(nodetect, "Skip DMI hardware detection"); |
| 25 | |
| 26 | static struct platform_device *pdev; |
| 27 | |
| 28 | static int __init clevo_mail_led_dmi_callback(const struct dmi_system_id *id) |
| 29 | { |
| 30 | pr_info("'%s' found\n", id->ident); |
| 31 | return 1; |
| 32 | } |
| 33 | |
| 34 | /* |
| 35 | * struct clevo_mail_led_dmi_table - List of known good models |
| 36 | * |
| 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 | */ |
| 43 | static struct dmi_system_id __initdata clevo_mail_led_dmi_table[] = { |
| 44 | { |
| 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, |
| 63 | .ident = "Clevo M5x0V", |
| 64 | .matches = { |
| 65 | DMI_MATCH(DMI_BOARD_VENDOR, "CLEVO Co. "), |
| 66 | DMI_MATCH(DMI_BOARD_NAME, "M5X0V "), |
| 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 | MODULE_DEVICE_TABLE(dmi, clevo_mail_led_dmi_table); |
| 93 | |
| 94 | static void clevo_mail_led_set(struct led_classdev *led_cdev, |
| 95 | enum led_brightness value) |
| 96 | { |
| 97 | i8042_lock_chip(); |
| 98 | |
| 99 | 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 | |
| 106 | i8042_unlock_chip(); |
| 107 | |
| 108 | } |
| 109 | |
| 110 | static int clevo_mail_led_blink(struct led_classdev *led_cdev, |
| 111 | unsigned long *delay_on, |
| 112 | unsigned long *delay_off) |
| 113 | { |
| 114 | int status = -EINVAL; |
| 115 | |
| 116 | i8042_lock_chip(); |
| 117 | |
| 118 | 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 { |
| 139 | pr_debug("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 | pr_err("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 | pr_err("Can't probe platform driver\n"); |
| 201 | platform_device_unregister(pdev); |
| 202 | } |
| 203 | } else |
| 204 | error = PTR_ERR(pdev); |
| 205 | |
| 206 | return error; |
| 207 | } |
| 208 | |
| 209 | static 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 | |
| 217 | module_init(clevo_mail_led_init); |
| 218 | module_exit(clevo_mail_led_exit); |
| 219 |
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Tags:
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