1 // SPDX-License-Identifier: GPL-2.0
4  *  Loongson PCH PIC support
7 #define pr_fmt(fmt) "pch-pic: " fmt
20 #include "irq-loongson.h"
43 	void __iomem		*base;  member
62 	return priv->table[hirq];  in hwirq_to_bit()
68 	void __iomem *addr = priv->base + offset + PIC_REG_IDX(bit) * 4;  in pch_pic_bitset()
70 	raw_spin_lock(&priv->pic_lock);  in pch_pic_bitset()
74 	raw_spin_unlock(&priv->pic_lock);  in pch_pic_bitset()
80 	void __iomem *addr = priv->base + offset + PIC_REG_IDX(bit) * 4;  in pch_pic_bitclr()
82 	raw_spin_lock(&priv->pic_lock);  in pch_pic_bitclr()
86 	raw_spin_unlock(&priv->pic_lock);  in pch_pic_bitclr()
93 	pch_pic_bitset(priv, PCH_PIC_MASK, hwirq_to_bit(priv, d->hwirq));  in pch_pic_mask_irq()
100 	int bit = hwirq_to_bit(priv, d->hwirq);  in pch_pic_unmask_irq()
103 			priv->base + PCH_PIC_CLR + PIC_REG_IDX(bit) * 4);  in pch_pic_unmask_irq()
112 	int bit = hwirq_to_bit(priv, d->hwirq);  in pch_pic_set_type()
137 		ret = -EINVAL;  in pch_pic_set_type()
148 	int bit = hwirq_to_bit(priv, d->hwirq);  in pch_pic_ack_irq()
150 	reg = readl(priv->base + PCH_PIC_EDGE + PIC_REG_IDX(bit) * 4);  in pch_pic_ack_irq()
153 			priv->base + PCH_PIC_CLR + PIC_REG_IDX(bit) * 4);  in pch_pic_ack_irq()
159 	.name			= "PCH PIC",
173 	struct pch_pic *priv = d->host_data;  in pch_pic_domain_translate()
174 	struct device_node *of_node = to_of_node(fwspec->fwnode);  in pch_pic_domain_translate()
179 		if (fwspec->param_count < 2)  in pch_pic_domain_translate()
180 			return -EINVAL;  in pch_pic_domain_translate()
182 		*hwirq = fwspec->param[0];  in pch_pic_domain_translate()
183 		*type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;  in pch_pic_domain_translate()
185 		if (fwspec->param_count < 1)  in pch_pic_domain_translate()
186 			return -EINVAL;  in pch_pic_domain_translate()
188 		*hwirq = fwspec->param[0] - priv->gsi_base;  in pch_pic_domain_translate()
190 		if (fwspec->param_count > 1)  in pch_pic_domain_translate()
191 			*type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;  in pch_pic_domain_translate()
196 	raw_spin_lock_irqsave(&priv->pic_lock, flags);  in pch_pic_domain_translate()
197 	/* Check pic-table to confirm if the hwirq has been assigned */  in pch_pic_domain_translate()
198 	for (i = 0; i < priv->inuse; i++) {  in pch_pic_domain_translate()
199 		if (priv->table[i] == *hwirq) {  in pch_pic_domain_translate()
204 	if (i == priv->inuse) {  in pch_pic_domain_translate()
205 		/* Assign a new hwirq in pic-table */  in pch_pic_domain_translate()
206 		if (priv->inuse >= PIC_COUNT) {  in pch_pic_domain_translate()
207 			pr_err("pch-pic domain has no free vectors\n");  in pch_pic_domain_translate()
208 			raw_spin_unlock_irqrestore(&priv->pic_lock, flags);  in pch_pic_domain_translate()
209 			return -EINVAL;  in pch_pic_domain_translate()
211 		priv->table[priv->inuse] = *hwirq;  in pch_pic_domain_translate()
212 		*hwirq = priv->inuse++;  in pch_pic_domain_translate()
214 	raw_spin_unlock_irqrestore(&priv->pic_lock, flags);  in pch_pic_domain_translate()
227 	struct pch_pic *priv = domain->host_data;  in pch_pic_alloc()
234 	writeb(priv->ht_vec_base + hwirq, priv->base + PCH_INT_HTVEC(hwirq_to_bit(priv, hwirq)));  in pch_pic_alloc()
236 	parent_fwspec.fwnode = domain->parent->fwnode;  in pch_pic_alloc()
238 	parent_fwspec.param[0] = hwirq + priv->ht_vec_base;  in pch_pic_alloc()
264 		writeb(priv->ht_vec_base + i, priv->base + PCH_INT_HTVEC(hwirq_to_bit(priv, i)));  in pch_pic_reset()
266 		writeb(1, priv->base + PCH_INT_ROUTE(i));  in pch_pic_reset()
271 		writel_relaxed(0xFFFFFFFF, priv->base + PCH_PIC_MASK + 4 * i);  in pch_pic_reset()
272 		writel_relaxed(0xFFFFFFFF, priv->base + PCH_PIC_CLR + 4 * i);  in pch_pic_reset()
274 		writel_relaxed(0, priv->base + PCH_PIC_AUTO0 + 4 * i);  in pch_pic_reset()
275 		writel_relaxed(0, priv->base + PCH_PIC_AUTO1 + 4 * i);  in pch_pic_reset()
277 		writel_relaxed(0xFFFFFFFF, priv->base + PCH_PIC_HTMSI_EN + 4 * i);  in pch_pic_reset()
287 			pch_pic_priv[i]->saved_vec_pol[j] =  in pch_pic_suspend()
288 				readl(pch_pic_priv[i]->base + PCH_PIC_POL + 4 * j);  in pch_pic_suspend()
289 			pch_pic_priv[i]->saved_vec_edge[j] =  in pch_pic_suspend()
290 				readl(pch_pic_priv[i]->base + PCH_PIC_EDGE + 4 * j);  in pch_pic_suspend()
291 			pch_pic_priv[i]->saved_vec_en[j] =  in pch_pic_suspend()
292 				readl(pch_pic_priv[i]->base + PCH_PIC_MASK + 4 * j);  in pch_pic_suspend()
306 			writel(pch_pic_priv[i]->saved_vec_pol[j],  in pch_pic_resume()
307 					pch_pic_priv[i]->base + PCH_PIC_POL + 4 * j);  in pch_pic_resume()
308 			writel(pch_pic_priv[i]->saved_vec_edge[j],  in pch_pic_resume()
309 					pch_pic_priv[i]->base + PCH_PIC_EDGE + 4 * j);  in pch_pic_resume()
310 			writel(pch_pic_priv[i]->saved_vec_en[j],  in pch_pic_resume()
311 					pch_pic_priv[i]->base + PCH_PIC_MASK + 4 * j);  in pch_pic_resume()
330 		return -ENOMEM;  in pch_pic_init()
332 	raw_spin_lock_init(&priv->pic_lock);  in pch_pic_init()
333 	priv->base = ioremap(addr, size);  in pch_pic_init()
334 	if (!priv->base)  in pch_pic_init()
337 	priv->inuse = 0;  in pch_pic_init()
339 		priv->table[i] = PIC_UNDEF_VECTOR;  in pch_pic_init()
341 	priv->ht_vec_base = vec_base;  in pch_pic_init()
342 	priv->vec_count = ((readq(priv->base) >> 48) & 0xff) + 1;  in pch_pic_init()
343 	priv->gsi_base = gsi_base;  in pch_pic_init()
345 	priv->pic_domain = irq_domain_create_hierarchy(parent_domain, 0,  in pch_pic_init()
346 						priv->vec_count, domain_handle,  in pch_pic_init()
349 	if (!priv->pic_domain) {  in pch_pic_init()
364 	iounmap(priv->base);  in pch_pic_init()
368 	return -EINVAL;  in pch_pic_init()
381 		return -EINVAL;  in pch_pic_of_init()
386 		return -ENXIO;  in pch_pic_of_init()
389 	if (of_property_read_u32(node, "loongson,pic-base-vec", &vec_base)) {  in pch_pic_of_init()
390 		pr_err("Failed to determine pic-base-vec\n");  in pch_pic_of_init()
391 		return -EINVAL;  in pch_pic_of_init()
402 IRQCHIP_DECLARE(pch_pic, "loongson,pch-pic-1.0", pch_pic_of_init);
416 			return -1;  in find_pch_pic()
418 		if (gsi >= priv->gsi_base && gsi < (priv->gsi_base + priv->vec_count))  in find_pch_pic()
423 	return -1;  in find_pch_pic()
431 	return pch_lpc_acpi_init(pch_pic_priv[0]->pic_domain, pchlpc_entry);  in pch_lpc_parse_madt()
451 	if (find_pch_pic(acpi_pchpic->gsi_base) >= 0)  in pch_pic_acpi_init()
454 	domain_handle = irq_domain_alloc_fwnode(&acpi_pchpic->address);  in pch_pic_acpi_init()
457 		return -ENOMEM;  in pch_pic_acpi_init()
460 	ret = pch_pic_init(acpi_pchpic->address, acpi_pchpic->size,  in pch_pic_acpi_init()
461 				0, parent, domain_handle, acpi_pchpic->gsi_base);  in pch_pic_acpi_init()
468 	if (acpi_pchpic->id == 0)  in pch_pic_acpi_init()