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- #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);
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