^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Driver for Samsung Q10 and related laptops: controls the backlight
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2011 Frederick van der Wyck <fvanderwyck@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/backlight.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/dmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define SAMSUNGQ10_BL_MAX_INTENSITY 7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static acpi_handle ec_handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static bool force;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) module_param(force, bool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) MODULE_PARM_DESC(force,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) "Disable the DMI check and force the driver to be loaded");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static int samsungq10_bl_set_intensity(struct backlight_device *bd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) for (i = 0; i < SAMSUNGQ10_BL_MAX_INTENSITY; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) status = acpi_evaluate_object(ec_handle, "_Q63", NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) for (i = 0; i < bd->props.brightness; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) status = acpi_evaluate_object(ec_handle, "_Q64", NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static const struct backlight_ops samsungq10_bl_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) .update_status = samsungq10_bl_set_intensity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static int samsungq10_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct backlight_properties props;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct backlight_device *bd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) memset(&props, 0, sizeof(struct backlight_properties));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) props.type = BACKLIGHT_PLATFORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) props.max_brightness = SAMSUNGQ10_BL_MAX_INTENSITY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) bd = backlight_device_register("samsung", &pdev->dev, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) &samsungq10_bl_ops, &props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (IS_ERR(bd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) return PTR_ERR(bd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) platform_set_drvdata(pdev, bd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static int samsungq10_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct backlight_device *bd = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) backlight_device_unregister(bd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static struct platform_driver samsungq10_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) .name = KBUILD_MODNAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .probe = samsungq10_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) .remove = samsungq10_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static struct platform_device *samsungq10_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static int __init dmi_check_callback(const struct dmi_system_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) printk(KERN_INFO KBUILD_MODNAME ": found model '%s'\n", id->ident);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static const struct dmi_system_id samsungq10_dmi_table[] __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .ident = "Samsung Q10",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) .matches = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) DMI_MATCH(DMI_SYS_VENDOR, "Samsung"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) DMI_MATCH(DMI_PRODUCT_NAME, "SQ10"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .callback = dmi_check_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .ident = "Samsung Q20",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .matches = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG Electronics"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) DMI_MATCH(DMI_PRODUCT_NAME, "SENS Q20"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .callback = dmi_check_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .ident = "Samsung Q25",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .matches = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG Electronics"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) DMI_MATCH(DMI_PRODUCT_NAME, "NQ25"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) .callback = dmi_check_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .ident = "Dell Latitude X200",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .matches = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) DMI_MATCH(DMI_PRODUCT_NAME, "X200"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .callback = dmi_check_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) MODULE_DEVICE_TABLE(dmi, samsungq10_dmi_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static int __init samsungq10_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (!force && !dmi_check_system(samsungq10_dmi_table))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) ec_handle = ec_get_handle();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (!ec_handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) samsungq10_device = platform_create_bundle(&samsungq10_driver,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) samsungq10_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) NULL, 0, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return PTR_ERR_OR_ZERO(samsungq10_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static void __exit samsungq10_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) platform_device_unregister(samsungq10_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) platform_driver_unregister(&samsungq10_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) module_init(samsungq10_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) module_exit(samsungq10_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) MODULE_AUTHOR("Frederick van der Wyck <fvanderwyck@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) MODULE_DESCRIPTION("Samsung Q10 Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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