1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Support for OLPC XO-1 System Control Interrupts (SCI)
21 #include <linux/olpc-ec.h>
23 #include <asm/io.h>
27 #define DRV_NAME	"olpc-xo1-sci"
83 	if (test_bit(SW_TABLET_MODE, ebook_switch_idev->sw) == !!state)  in send_ebook_state()
88 	pm_wakeup_event(&ebook_switch_idev->dev, 0);  in send_ebook_state()
93 	/* gpio is high; invert so we'll get l->h event interrupt */  in flip_lid_inverter()
110 	 * front-end inverter to ensure that that's the edge we're always  in detect_lid_state()
127 	if (!!test_bit(SW_LID, lid_switch_idev->sw) == !lid_open)  in send_lid_state()
132 	pm_wakeup_event(&lid_switch_idev->dev, 0);  in send_lid_state()
154 	return -EINVAL;  in lid_wake_mode_set()
168  * This is handled in a workqueue because olpc_ec_cmd can be slow (and
225 	dev_dbg(&pdev->dev, "sts %x gpe %x\n", sts, gpe);  in xo1_sci_intr()
238 		pm_wakeup_event(&power_button_idev->dev, 0);  in xo1_sci_intr()
268 	if (device_may_wakeup(&power_button_idev->dev))  in xo1_sci_suspend()
273 	if (device_may_wakeup(&ebook_switch_idev->dev))  in xo1_sci_suspend()
278 	if (!device_may_wakeup(&lid_switch_idev->dev)) {  in xo1_sci_suspend()
323 		dev_info(&pdev->dev, "SCI is mapped to IRQ %d\n", sci_irq);  in setup_sci_interrupt()
326 		dev_info(&pdev->dev, "SCI unmapped. Mapping to IRQ 3\n");  in setup_sci_interrupt()
339 		lo |= 1 << (sci_irq - 8);  in setup_sci_interrupt()
350 		dev_err(&pdev->dev, "can't request interrupt\n");  in setup_sci_interrupt()
359 	r = gpio_request(OLPC_GPIO_ECSCI, "OLPC-ECSCI");  in setup_ec_sci()
373 	 * Ordinarily, in addition to functioning as GPIOs, Geode GPIOs can  in setup_ec_sci()
374 	 * be mapped to regular interrupts *or* Geode-specific Power  in setup_ec_sci()
375 	 * Management Events (PMEs) - events that bring the system out of  in setup_ec_sci()
376 	 * suspend. In this case, we want both of those things - the system  in setup_ec_sci()
403 	r = gpio_request(OLPC_GPIO_LID, "OLPC-LID");  in setup_lid_events()
442 		return -ENOMEM;  in setup_power_button()
444 	power_button_idev->name = "Power Button";  in setup_power_button()
445 	power_button_idev->phys = DRV_NAME "/input0";  in setup_power_button()
446 	set_bit(EV_KEY, power_button_idev->evbit);  in setup_power_button()
447 	set_bit(KEY_POWER, power_button_idev->keybit);  in setup_power_button()
449 	power_button_idev->dev.parent = &pdev->dev;  in setup_power_button()
450 	device_init_wakeup(&power_button_idev->dev, 1);  in setup_power_button()
454 		dev_err(&pdev->dev, "failed to register power button: %d\n", r);  in setup_power_button()
472 		return -ENOMEM;  in setup_ebook_switch()
474 	ebook_switch_idev->name = "EBook Switch";  in setup_ebook_switch()
475 	ebook_switch_idev->phys = DRV_NAME "/input1";  in setup_ebook_switch()
476 	set_bit(EV_SW, ebook_switch_idev->evbit);  in setup_ebook_switch()
477 	set_bit(SW_TABLET_MODE, ebook_switch_idev->swbit);  in setup_ebook_switch()
479 	ebook_switch_idev->dev.parent = &pdev->dev;  in setup_ebook_switch()
480 	device_set_wakeup_capable(&ebook_switch_idev->dev, true);  in setup_ebook_switch()
484 		dev_err(&pdev->dev, "failed to register ebook switch: %d\n", r);  in setup_ebook_switch()
502 		return -ENOMEM;  in setup_lid_switch()
504 	lid_switch_idev->name = "Lid Switch";  in setup_lid_switch()
505 	lid_switch_idev->phys = DRV_NAME "/input2";  in setup_lid_switch()
506 	set_bit(EV_SW, lid_switch_idev->evbit);  in setup_lid_switch()
507 	set_bit(SW_LID, lid_switch_idev->swbit);  in setup_lid_switch()
509 	lid_switch_idev->dev.parent = &pdev->dev;  in setup_lid_switch()
510 	device_set_wakeup_capable(&lid_switch_idev->dev, true);  in setup_lid_switch()
514 		dev_err(&pdev->dev, "failed to register lid switch: %d\n", r);  in setup_lid_switch()
535 	/* don't run on non-XOs */  in xo1_sci_probe()
537 		return -ENODEV;  in xo1_sci_probe()
541 		dev_err(&pdev->dev, "can't fetch device resource info\n");  in xo1_sci_probe()
542 		return -EIO;  in xo1_sci_probe()
544 	acpi_base = res->start;  in xo1_sci_probe()
566 	/* Enable PME generation for EC-generated events */  in xo1_sci_probe()
615 		.name = "olpc-xo1-sci-acpi",