drivers/parisc/led.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *	Chassis LCD/LED driver for HP-PARISC workstations
8  *	(c) Copyright 2000-2023 Helge Deller <deller@gmx.de>
52    lcd_cmd_reg_addr needs to be 64bit aligned on 64bit PA2.0-machines */
55 	unsigned long lcd_width:16;	/* width of the LCD in chars (DISPLAY_MODEL_LCD only) */
56 	unsigned long lcd_cmd_reg_addr;	/* ptr to LCD cmd-register & data ptr for LED */
57 	unsigned long lcd_data_reg_addr; /* ptr to LCD data-register (LCD only) */
58 	unsigned int min_cmd_delay;	/* delay in uS after cmd-write (LCD only) */
74 /* lcd_info is pre-initialized to the values needed to program KittyHawk LCD's
93 /* ptr to LCD/LED-specific function */
125  *	Displays the given string on the LCD-Display of newer machines.
129 	/* copy display string to buffer for procfs */  in lcd_print()
143  *	led_ASP_driver() - LED driver for the ASP controller chip
162  *	led_LASI_driver() - LED driver for the LASI controller chip
173  *	led_LCD_driver() - LED & LCD driver for LCD chips
196 		gsc_writeb( blockp[i]->command, LCD_CMD_REG );  in led_LCD_driver()
199 		gsc_writeb( leds & mask[i] ? blockp[i]->on :  in led_LCD_driver()
200 				blockp[i]->off, LCD_DATA_REG );  in led_LCD_driver()
265 	unsigned char led_bit = p->led_bit;  in set_led()
283 	p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);  in hppa_led_generic_probe()
285 		return -ENOMEM;  in hppa_led_generic_probe()
288 		struct led_classdev *lp = &p->leds[i].led_cdev;  in hppa_led_generic_probe()
290 		p->leds[i].led_bit = BIT(i);  in hppa_led_generic_probe()
291 		lp->name = types[i].name;  in hppa_led_generic_probe()
292 		lp->brightness = LED_FULL;  in hppa_led_generic_probe()
293 		lp->brightness_set = types[i].handler;  in hppa_led_generic_probe()
294 		lp->default_trigger = types[i].default_trigger;  in hppa_led_generic_probe()
295 		err = led_classdev_register(&pdev->dev, lp);  in hppa_led_generic_probe()
297 			dev_err(&pdev->dev, "Could not register %s LED\n",  in hppa_led_generic_probe()
298 			       lp->name);  in hppa_led_generic_probe()
299 			for (i--; i >= 0; i--)  in hppa_led_generic_probe()
300 				led_classdev_unregister(&p->leds[i].led_cdev);  in hppa_led_generic_probe()
316 		led_classdev_unregister(&p->leds[i].led_cdev);  in platform_led_remove()
321 		.name		= "platform-lan-tx",
326 		.name		= "platform-lan-rx",
331 		.name		= "platform-disk",
333 		.default_trigger = "disk-activity",
336 		.name		= "platform-heartbeat",
341 		.name		= "platform-LED4",
346 		.name		= "platform-LED5",
351 		.name		= "platform-LED6",
356 		.name		= "platform-LED7",
367 MODULE_ALIAS("platform:platform-leds");
373 		.name	= "platform-leds",
382 	.name = "platform-leds",
393  *	Only PDC-based, LASI- or ASP-style LEDs and LCDs are supported.
410 		pr_info("led: LCD display at %#lx and %#lx\n",  in register_led_driver()
422 		pr_info("led: LED display at %#lx\n", LED_DATA_REG);  in register_led_driver()
429 		pr_info("led: LED (ASP-style) display at %#lx\n",  in register_led_driver()
447  *	early_led_init() is called early in the bootup-process and asks the
459 		"Linux %s", init_utsname()->release);  in early_led_init()
462 	/* Work around the buggy PDC of KittyHawk-machines */  in early_led_init()
464 	case 0x580:		/* KittyHawk DC2-100 (K100) */  in early_led_init()
465 	case 0x581:		/* KittyHawk DC3-120 (K210) */  in early_led_init()
469 		pr_info("LCD on KittyHawk-Machine found.\n");  in early_led_init()
491 	case DISPLAY_MODEL_LCD:		/* LCD display */  in early_led_init()
493 			offsetof(struct pdc_chassis_lcd_info_ret_block, _pad)-1)  in early_led_init()
504 	case DISPLAY_MODEL_LASI:	/* Lasi style 8 bit LED display */  in early_led_init()
525  *	At bootup - where the initialisation of the LCD/LED often happens
527  *	so that we delay the led-registration until after busdevices_init()