diff options
Diffstat (limited to 'drivers/leds/leds-clevo-mail.c')
| -rw-r--r-- | drivers/leds/leds-clevo-mail.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/drivers/leds/leds-clevo-mail.c b/drivers/leds/leds-clevo-mail.c new file mode 100644 index 0000000000..f512e99b97 --- /dev/null +++ b/drivers/leds/leds-clevo-mail.c @@ -0,0 +1,217 @@ +// SPDX-License-Identifier: GPL-2.0-only +#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 const struct dmi_system_id clevo_mail_led_dmi_table[] __initconst = { + { + .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); |