/* * leds-dx010-status.c - Driver for Seastone DX010 front panel LEDs * * Copyright (C) 2017 Celestica Corp. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #define DRIVER_NAME "leds_dx010" #define FRONT_LED_STAT 0x303 static int dx010_led_blink_stat(struct led_classdev *led_cdev, unsigned long *delay_on, unsigned long *delay_off) { unsigned char led; if (!(*delay_on == 0 && *delay_off == 0) && !(*delay_on == 250 && *delay_off == 250) && !(*delay_on == 500 && *delay_off == 500)) return -EINVAL; led = inb(FRONT_LED_STAT); led &= 0xfc; if ((*delay_on == 250) && (*delay_off == 250)) led |= 0x02; else if ((*delay_on == 500) && (*delay_off == 500)) led |= 0x01; outb(led, FRONT_LED_STAT); return 0; } static ssize_t dx010_led_blink_show_stat(struct device *dev, struct device_attribute *attr, char *buf) { struct led_classdev *leddev = dev_get_drvdata(dev); unsigned char led; const char *msg; led = inb(FRONT_LED_STAT); led &= 0x03; switch (led) { case 0: msg = "No blinking, turn on"; break; case 1: msg = "1 Hz is blinking"; break; case 2: msg = "4 Hz is blinking"; break; case 3: msg = "No blinking, turn off"; break; default: msg = "Unknown error"; break; } return sprintf(buf, "%s\n", msg); } static ssize_t dx010_led_blink_store_stat(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { int ret; struct led_classdev *leddev = dev_get_drvdata(dev); unsigned long blink_state; unsigned char led; ret = kstrtoul(buf, 10, &blink_state); if (ret) return ret; led = inb(FRONT_LED_STAT); led &= 0xfc; switch (blink_state) { case 0: led |= 0x03; break; case 1: break; case 250: led |= 0x02; break; case 500: led |= 0x01; break; default: return -EINVAL; break; } outb(led, FRONT_LED_STAT); return size; } static DEVICE_ATTR(blink, 0644, dx010_led_blink_show_stat, dx010_led_blink_store_stat); static void dx010_led_brightness_set_stat(struct led_classdev *led_cdev, enum led_brightness brightness) { unsigned char led; led = inb(FRONT_LED_STAT); led &= 0xfc; if (!brightness) led |= 0x03; outb( led, FRONT_LED_STAT); } enum led_brightness dx010_led_brightness_get_p2(struct led_classdev *led_cdev) { unsigned char led; led = inb(FRONT_LED_STAT); return (led & 0x08) ? LED_OFF : LED_FULL; } static void dx010_led_brightness_set_p2(struct led_classdev *led_cdev, enum led_brightness brightness) { unsigned char led; led = inb(FRONT_LED_STAT); led &= 0xf7; if (!brightness) led |= 0x08; outb( led, FRONT_LED_STAT); } enum led_brightness dx010_led_brightness_get_p1(struct led_classdev *led_cdev) { unsigned char led; led = inb(FRONT_LED_STAT); return (led & 0x04) ? LED_OFF : LED_FULL; } static void dx010_led_brightness_set_p1(struct led_classdev *led_cdev, enum led_brightness brightness) { unsigned char led; led = inb(FRONT_LED_STAT); led &= 0xfb; if (!brightness) led |= 0x04; outb( led, FRONT_LED_STAT); } static struct led_classdev dx010_leds[] = { { .name = "dx010:green:p-1", .brightness = LED_OFF, .max_brightness = 1, .brightness_get = dx010_led_brightness_get_p1, .brightness_set = dx010_led_brightness_set_p1, }, { .name = "dx010:green:p-2", .brightness = LED_OFF, .max_brightness = 1, .brightness_get = dx010_led_brightness_get_p2, .brightness_set = dx010_led_brightness_set_p2, }, { .name = "dx010:green:stat", .brightness = LED_OFF, .max_brightness = 1, .brightness_set = dx010_led_brightness_set_stat, .blink_set = dx010_led_blink_stat, .flags = LED_CORE_SUSPENDRESUME, }, }; static struct resource dx010_led_resources[] = { { .flags = IORESOURCE_IO, }, }; static void dx010_led_dev_release( struct device * dev) { return; } static struct platform_device dx010_lpc_dev = { .name = DRIVER_NAME, .id = -1, .num_resources = ARRAY_SIZE(dx010_led_resources), .resource = dx010_led_resources, .dev = { .release = dx010_led_dev_release, } }; static int dx010_led_drv_probe(struct platform_device *pdev) { int i, ret; for (i = 0; i < ARRAY_SIZE(dx010_leds); i++) { ret = led_classdev_register(&pdev->dev, &dx010_leds[i]); if (ret < 0) goto exit; } ret = device_create_file(&pdev->dev, &dev_attr_blink); if (ret) { for (i = 0; i < ARRAY_SIZE(dx010_leds); i++) led_classdev_unregister(&dx010_leds[i]); } exit: return ret; } static int dx010_led_drv_remove(struct platform_device *pdev) { int i; for (i = 0; i < ARRAY_SIZE(dx010_leds); i++) led_classdev_unregister(&dx010_leds[i]); device_remove_file(&pdev->dev, &dev_attr_blink); return 0; } static struct platform_driver dx010_led_drv = { .probe = dx010_led_drv_probe, .remove = __exit_p(dx010_led_drv_remove), .driver = { .name = DRIVER_NAME, }, }; int dx010_led_init(void) { platform_device_register(&dx010_lpc_dev); platform_driver_register(&dx010_led_drv); return 0; } void dx010_led_exit(void) { platform_driver_unregister(&dx010_led_drv); platform_device_unregister(&dx010_lpc_dev); } module_init(dx010_led_init); module_exit(dx010_led_exit); MODULE_AUTHOR("Abhisit Sangjan "); MODULE_DESCRIPTION("Celestica SeaStone DX010 LEDs Front Panel Status Driver"); MODULE_LICENSE("GPL");