1 // SPDX-License-Identifier: GPL-2.0-only
3  * PRU-ICSS INTC IRQChip driver for various TI SoCs
5  * Copyright (C) 2016-2020 Texas Instruments Incorporated - http://www.ti.com/
9  *	Suman Anna <s-anna@ti.com>
24  * Number of host interrupts reaching the main MPU sub-system. Note that this
57 /* CMR register bit-field macros */
62 /* HMR register bit-field macros */
67 /* HIPIR register bit-fields */
74  * struct pruss_intc_map_record - keeps track of actual mapping state
84  * struct pruss_intc_match_data - match data to handle SoC variations
95  * struct pruss_intc - PRUSS interrupt controller structure
98  * @irqs: kernel irq numbers corresponding to PRUSS host interrupts
108 	unsigned int irqs[MAX_NUM_HOST_IRQS];  member
117  * struct pruss_host_irq_data - PRUSS host irq data structure
128 	return readl_relaxed(intc->base + reg);  in pruss_intc_read_reg()
134 	writel_relaxed(val, intc->base + reg);  in pruss_intc_write_reg()
150 	dev_dbg(intc->dev, "SYSEV%u -> CH%d (CMR%d 0x%08x)\n", evt, ch,  in pruss_intc_update_cmr()
166 	dev_dbg(intc->dev, "CH%d -> HOST%d (HMR%d 0x%08x)\n", ch, host, idx,  in pruss_intc_update_hmr()
171  * pruss_intc_map() - configure the PRUSS INTC
180 	struct device *dev = intc->dev;  in pruss_intc_map()
184 	mutex_lock(&intc->lock);  in pruss_intc_map()
186 	intc->event_channel[hwirq].ref_count++;  in pruss_intc_map()
188 	ch = intc->event_channel[hwirq].value;  in pruss_intc_map()
189 	host = intc->channel_host[ch].value;  in pruss_intc_map()
200 	if (++intc->channel_host[ch].ref_count == 1) {  in pruss_intc_map()
210 	mutex_unlock(&intc->lock);  in pruss_intc_map()
214  * pruss_intc_unmap() - unconfigure the PRUSS INTC
227 	mutex_lock(&intc->lock);  in pruss_intc_unmap()
229 	ch = intc->event_channel[hwirq].value;  in pruss_intc_unmap()
230 	host = intc->channel_host[ch].value;  in pruss_intc_unmap()
232 	if (--intc->channel_host[ch].ref_count == 0) {  in pruss_intc_unmap()
240 	intc->event_channel[hwirq].ref_count--;  in pruss_intc_unmap()
252 	dev_dbg(intc->dev, "unmapped system_event = %lu channel = %d host = %d\n",  in pruss_intc_unmap()
255 	mutex_unlock(&intc->lock);  in pruss_intc_unmap()
260 	const struct pruss_intc_match_data *soc_config = intc->soc_config;  in pruss_intc_init()
263 	num_chnl_map_regs = DIV_ROUND_UP(soc_config->num_system_events,  in pruss_intc_init()
265 	num_host_intr_regs = DIV_ROUND_UP(soc_config->num_host_events,  in pruss_intc_init()
267 	num_event_type_regs = DIV_ROUND_UP(soc_config->num_system_events, 32);  in pruss_intc_init()
293 	unsigned int hwirq = data->hwirq;  in pruss_intc_irq_ack()
301 	unsigned int hwirq = data->hwirq;  in pruss_intc_irq_mask()
309 	unsigned int hwirq = data->hwirq;  in pruss_intc_irq_unmask()
317 		return -ENODEV;  in pruss_intc_irq_reqres()
335 		return -EINVAL;  in pruss_intc_irq_get_irqchip_state()
337 	reg = PRU_INTC_SRSR(data->hwirq / 32);  in pruss_intc_irq_get_irqchip_state()
338 	mask = BIT(data->hwirq % 32);  in pruss_intc_irq_get_irqchip_state()
354 		return -EINVAL;  in pruss_intc_irq_set_irqchip_state()
357 		pruss_intc_write_reg(intc, PRU_INTC_SISR, data->hwirq);  in pruss_intc_irq_set_irqchip_state()
359 		pruss_intc_write_reg(intc, PRU_INTC_SICR, data->hwirq);  in pruss_intc_irq_set_irqchip_state()
365 	.name			= "pruss-intc",
378 	struct device *dev = intc->dev;  in pruss_intc_validate_mapping()
381 	mutex_lock(&intc->lock);  in pruss_intc_validate_mapping()
384 	if (intc->event_channel[event].ref_count > 0 &&  in pruss_intc_validate_mapping()
385 	    intc->event_channel[event].value != channel) {  in pruss_intc_validate_mapping()
387 			event, channel, intc->event_channel[event].value);  in pruss_intc_validate_mapping()
388 		ret = -EBUSY;  in pruss_intc_validate_mapping()
393 	if (intc->channel_host[channel].ref_count > 0 &&  in pruss_intc_validate_mapping()
394 	    intc->channel_host[channel].value != host) {  in pruss_intc_validate_mapping()
396 			channel, host, intc->channel_host[channel].value);  in pruss_intc_validate_mapping()
397 		ret = -EBUSY;  in pruss_intc_validate_mapping()
401 	intc->event_channel[event].value = channel;  in pruss_intc_validate_mapping()
402 	intc->channel_host[channel].value = host;  in pruss_intc_validate_mapping()
405 	mutex_unlock(&intc->lock);  in pruss_intc_validate_mapping()
414 	struct pruss_intc *intc = d->host_data;  in pruss_intc_irq_domain_xlate()
415 	struct device *dev = intc->dev;  in pruss_intc_irq_domain_xlate()
419 		return -EINVAL;  in pruss_intc_irq_domain_xlate()
422 	if (sys_event < 0 || sys_event >= intc->soc_config->num_system_events) {  in pruss_intc_irq_domain_xlate()
424 		return -EINVAL;  in pruss_intc_irq_domain_xlate()
428 	if (channel < 0 || channel >= intc->soc_config->num_host_events) {  in pruss_intc_irq_domain_xlate()
430 		return -EINVAL;  in pruss_intc_irq_domain_xlate()
434 	if (host < 0 || host >= intc->soc_config->num_host_events) {  in pruss_intc_irq_domain_xlate()
436 		return -EINVAL;  in pruss_intc_irq_domain_xlate()
453 	struct pruss_intc *intc = d->host_data;  in pruss_intc_irq_domain_map()
465 	struct pruss_intc *intc = d->host_data;  in pruss_intc_irq_domain_unmap()
484 	struct pruss_intc *intc = host_irq_data->intc;  in pruss_intc_irq_handler()
485 	u8 host_irq = host_irq_data->host_irq + FIRST_PRU_HOST_INT;  in pruss_intc_irq_handler()
499 		err = generic_handle_domain_irq(intc->domain, hwirq);  in pruss_intc_irq_handler()
520 	struct device *dev = &pdev->dev;  in pruss_intc_probe()
528 		return -ENODEV;  in pruss_intc_probe()
530 	max_system_events = data->num_system_events;  in pruss_intc_probe()
534 		return -ENOMEM;  in pruss_intc_probe()
536 	intc->soc_config = data;  in pruss_intc_probe()
537 	intc->dev = dev;  in pruss_intc_probe()
540 	intc->base = devm_platform_ioremap_resource(pdev, 0);  in pruss_intc_probe()
541 	if (IS_ERR(intc->base))  in pruss_intc_probe()
542 		return PTR_ERR(intc->base);  in pruss_intc_probe()
544 	ret = of_property_read_u8(dev->of_node, "ti,irqs-reserved",  in pruss_intc_probe()
548 	 * The irqs-reserved is used only for some SoC's therefore not having  in pruss_intc_probe()
551 	if (ret < 0 && ret != -EINVAL)  in pruss_intc_probe()
556 	mutex_init(&intc->lock);  in pruss_intc_probe()
558 	intc->domain = irq_domain_add_linear(dev->of_node, max_system_events,  in pruss_intc_probe()
560 	if (!intc->domain)  in pruss_intc_probe()
561 		return -ENOMEM;  in pruss_intc_probe()
573 		intc->irqs[i] = irq;  in pruss_intc_probe()
577 			ret = -ENOMEM;  in pruss_intc_probe()
581 		host_data->intc = intc;  in pruss_intc_probe()
582 		host_data->host_irq = i;  in pruss_intc_probe()
591 	while (--i >= 0) {  in pruss_intc_probe()
592 		if (intc->irqs[i])  in pruss_intc_probe()
593 			irq_set_chained_handler_and_data(intc->irqs[i], NULL,  in pruss_intc_probe()
597 	irq_domain_remove(intc->domain);  in pruss_intc_probe()
605 	u8 max_system_events = intc->soc_config->num_system_events;  in pruss_intc_remove()
610 		if (intc->irqs[i])  in pruss_intc_remove()
611 			irq_set_chained_handler_and_data(intc->irqs[i], NULL,  in pruss_intc_remove()
616 		irq_dispose_mapping(irq_find_mapping(intc->domain, hwirq));  in pruss_intc_remove()
618 	irq_domain_remove(intc->domain);  in pruss_intc_remove()
633 		.compatible = "ti,pruss-intc",
637 		.compatible = "ti,icssg-intc",
646 		.name			= "pruss-intc",
656 MODULE_AUTHOR("Suman Anna <s-anna@ti.com>");
658 MODULE_DESCRIPTION("TI PRU-ICSS INTC Driver");