1 // SPDX-License-Identifier: GPL-2.0
4  *  Loongson PCH PIC support
7 #define pr_fmt(fmt) "pch-pic: " fmt
39 	void __iomem		*base;  member
54 	void __iomem *addr = priv->base + offset + PIC_REG_IDX(bit) * 4;  in pch_pic_bitset()
56 	raw_spin_lock(&priv->pic_lock);  in pch_pic_bitset()
60 	raw_spin_unlock(&priv->pic_lock);  in pch_pic_bitset()
66 	void __iomem *addr = priv->base + offset + PIC_REG_IDX(bit) * 4;  in pch_pic_bitclr()
68 	raw_spin_lock(&priv->pic_lock);  in pch_pic_bitclr()
72 	raw_spin_unlock(&priv->pic_lock);  in pch_pic_bitclr()
79 	pch_pic_bitset(priv, PCH_PIC_MASK, d->hwirq);  in pch_pic_mask_irq()
87 	writel(BIT(PIC_REG_BIT(d->hwirq)),  in pch_pic_unmask_irq()
88 			priv->base + PCH_PIC_CLR + PIC_REG_IDX(d->hwirq) * 4);  in pch_pic_unmask_irq()
91 	pch_pic_bitclr(priv, PCH_PIC_MASK, d->hwirq);  in pch_pic_unmask_irq()
101 		pch_pic_bitset(priv, PCH_PIC_EDGE, d->hwirq);  in pch_pic_set_type()
102 		pch_pic_bitclr(priv, PCH_PIC_POL, d->hwirq);  in pch_pic_set_type()
106 		pch_pic_bitset(priv, PCH_PIC_EDGE, d->hwirq);  in pch_pic_set_type()
107 		pch_pic_bitset(priv, PCH_PIC_POL, d->hwirq);  in pch_pic_set_type()
111 		pch_pic_bitclr(priv, PCH_PIC_EDGE, d->hwirq);  in pch_pic_set_type()
112 		pch_pic_bitclr(priv, PCH_PIC_POL, d->hwirq);  in pch_pic_set_type()
116 		pch_pic_bitclr(priv, PCH_PIC_EDGE, d->hwirq);  in pch_pic_set_type()
117 		pch_pic_bitset(priv, PCH_PIC_POL, d->hwirq);  in pch_pic_set_type()
121 		ret = -EINVAL;  in pch_pic_set_type()
133 	reg = readl(priv->base + PCH_PIC_EDGE + PIC_REG_IDX(d->hwirq) * 4);  in pch_pic_ack_irq()
134 	if (reg & BIT(PIC_REG_BIT(d->hwirq))) {  in pch_pic_ack_irq()
135 		writel(BIT(PIC_REG_BIT(d->hwirq)),  in pch_pic_ack_irq()
136 			priv->base + PCH_PIC_CLR + PIC_REG_IDX(d->hwirq) * 4);  in pch_pic_ack_irq()
142 	.name			= "PCH PIC",
155 	struct pch_pic *priv = d->host_data;  in pch_pic_domain_translate()
156 	struct device_node *of_node = to_of_node(fwspec->fwnode);  in pch_pic_domain_translate()
158 	if (fwspec->param_count < 1)  in pch_pic_domain_translate()
159 		return -EINVAL;  in pch_pic_domain_translate()
162 		*hwirq = fwspec->param[0] + priv->ht_vec_base;  in pch_pic_domain_translate()
163 		*type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;  in pch_pic_domain_translate()
165 		*hwirq = fwspec->param[0] - priv->gsi_base;  in pch_pic_domain_translate()
180 	struct pch_pic *priv = domain->host_data;  in pch_pic_alloc()
186 	parent_fwspec.fwnode = domain->parent->fwnode;  in pch_pic_alloc()
214 		writeb(priv->ht_vec_base + i, priv->base + PCH_INT_HTVEC(i));  in pch_pic_reset()
216 		writeb(1, priv->base + PCH_INT_ROUTE(i));  in pch_pic_reset()
221 		writel_relaxed(0xFFFFFFFF, priv->base + PCH_PIC_MASK + 4 * i);  in pch_pic_reset()
222 		writel_relaxed(0xFFFFFFFF, priv->base + PCH_PIC_CLR + 4 * i);  in pch_pic_reset()
224 		writel_relaxed(0, priv->base + PCH_PIC_AUTO0 + 4 * i);  in pch_pic_reset()
225 		writel_relaxed(0, priv->base + PCH_PIC_AUTO1 + 4 * i);  in pch_pic_reset()
227 		writel_relaxed(0xFFFFFFFF, priv->base + PCH_PIC_HTMSI_EN + 4 * i);  in pch_pic_reset()
239 		return -ENOMEM;  in pch_pic_init()
241 	raw_spin_lock_init(&priv->pic_lock);  in pch_pic_init()
242 	priv->base = ioremap(addr, size);  in pch_pic_init()
243 	if (!priv->base)  in pch_pic_init()
246 	priv->ht_vec_base = vec_base;  in pch_pic_init()
247 	priv->vec_count = ((readq(priv->base) >> 48) & 0xff) + 1;  in pch_pic_init()
248 	priv->gsi_base = gsi_base;  in pch_pic_init()
250 	priv->pic_domain = irq_domain_create_hierarchy(parent_domain, 0,  in pch_pic_init()
251 						priv->vec_count, domain_handle,  in pch_pic_init()
254 	if (!priv->pic_domain) {  in pch_pic_init()
266 	iounmap(priv->base);  in pch_pic_init()
270 	return -EINVAL;  in pch_pic_init()
283 		return -EINVAL;  in pch_pic_of_init()
288 		return -ENXIO;  in pch_pic_of_init()
291 	if (of_property_read_u32(node, "loongson,pic-base-vec", &vec_base)) {  in pch_pic_of_init()
292 		pr_err("Failed to determine pic-base-vec\n");  in pch_pic_of_init()
293 		return -EINVAL;  in pch_pic_of_init()
304 IRQCHIP_DECLARE(pch_pic, "loongson,pch-pic-1.0", pch_pic_of_init);
318 			return -1;  in find_pch_pic()
320 		if (gsi >= priv->gsi_base && gsi < (priv->gsi_base + priv->vec_count))  in find_pch_pic()
325 	return -1;  in find_pch_pic()
334 	return pch_lpc_acpi_init(pch_pic_priv[0]->pic_domain, pchlpc_entry);  in pch_lpc_parse_madt()
350 	vec_base = acpi_pchpic->gsi_base - GSI_MIN_PCH_IRQ;  in pch_pic_acpi_init()
352 	domain_handle = irq_domain_alloc_fwnode(&acpi_pchpic->address);  in pch_pic_acpi_init()
355 		return -ENOMEM;  in pch_pic_acpi_init()
358 	ret = pch_pic_init(acpi_pchpic->address, acpi_pchpic->size,  in pch_pic_acpi_init()
359 				vec_base, parent, domain_handle, acpi_pchpic->gsi_base);  in pch_pic_acpi_init()
366 	if (acpi_pchpic->id == 0)  in pch_pic_acpi_init()