1 // SPDX-License-Identifier: GPL-2.0
28 MODULE_DESCRIPTION("Amazon's Annapurna Labs Interrupt Controller Driver");
37 	void __iomem *base;  member
49 	u32 control = readl_relaxed(fic->base + AL_FIC_CONTROL);  in al_fic_set_trigger()
58 	gc->chip_types->handler = handler;  in al_fic_set_trigger()
59 	fic->state = new_state;  in al_fic_set_trigger()
60 	writel_relaxed(control, fic->base + AL_FIC_CONTROL);  in al_fic_set_trigger()
66 	struct al_fic *fic = gc->private;  in al_fic_irq_set_type()
69 	guard(raw_spinlock)(&gc->lock);  in al_fic_irq_set_type()
74 		return -EINVAL;  in al_fic_irq_set_type()
89 	if (fic->state == AL_FIC_UNCONFIGURED) {  in al_fic_irq_set_type()
91 	} else if (fic->state != new_state) {  in al_fic_irq_set_type()
92 		pr_debug("fic %s state already configured to %d\n", fic->name, fic->state);  in al_fic_irq_set_type()
93 		return -EINVAL;  in al_fic_irq_set_type()
101 	struct irq_domain *domain = fic->domain;  in al_fic_irq_handler()
109 	pending = readl_relaxed(fic->base + AL_FIC_CAUSE);  in al_fic_irq_handler()
110 	pending &= ~gc->mask_cache;  in al_fic_irq_handler()
121 	struct al_fic *fic = gc->private;  in al_fic_irq_retrigger()
123 	writel_relaxed(BIT(data->hwirq), fic->base + AL_FIC_SET_CAUSE);  in al_fic_irq_retrigger()
134 	fic->domain = irq_domain_create_linear(of_fwnode_handle(node),  in al_fic_register()
138 	if (!fic->domain) {  in al_fic_register()
140 		return -ENOMEM;  in al_fic_register()
143 	ret = irq_alloc_domain_generic_chips(fic->domain,  in al_fic_register()
145 					     1, fic->name,  in al_fic_register()
153 	gc = irq_get_domain_generic_chip(fic->domain, 0);  in al_fic_register()
154 	gc->reg_base = fic->base;  in al_fic_register()
155 	gc->chip_types->regs.mask = AL_FIC_MASK;  in al_fic_register()
156 	gc->chip_types->regs.ack = AL_FIC_CAUSE;  in al_fic_register()
157 	gc->chip_types->chip.irq_mask = irq_gc_mask_set_bit;  in al_fic_register()
158 	gc->chip_types->chip.irq_unmask = irq_gc_mask_clr_bit;  in al_fic_register()
159 	gc->chip_types->chip.irq_ack = irq_gc_ack_clr_bit;  in al_fic_register()
160 	gc->chip_types->chip.irq_set_type = al_fic_irq_set_type;  in al_fic_register()
161 	gc->chip_types->chip.irq_retrigger = al_fic_irq_retrigger;  in al_fic_register()
162 	gc->chip_types->chip.flags = IRQCHIP_SKIP_SET_WAKE;  in al_fic_register()
163 	gc->private = fic;  in al_fic_register()
165 	irq_set_chained_handler_and_data(fic->parent_irq,  in al_fic_register()
171 	irq_domain_remove(fic->domain);  in al_fic_register()
177  * al_fic_wire_init() - initialize and configure fic in wire mode
178  * @of_node: optional pointer to interrupt controller's device tree node.
179  * @base: mmio to fic register
181  * @parent_irq: interrupt of parent
184  * In wire mode, fic hardware is generating a wire ("wired") interrupt.
185  * Interrupt can be generated based on positive edge or level - configuration is
189 				       void __iomem *base,  in al_fic_wire_init()  argument
199 		return ERR_PTR(-ENOMEM);  in al_fic_wire_init()
201 	fic->base = base;  in al_fic_wire_init()
202 	fic->parent_irq = parent_irq;  in al_fic_wire_init()
203 	fic->name = name;  in al_fic_wire_init()
206 	writel_relaxed(0xFFFFFFFF, fic->base + AL_FIC_MASK);  in al_fic_wire_init()
208 	/* clear any pending interrupt */  in al_fic_wire_init()
209 	writel_relaxed(0, fic->base + AL_FIC_CAUSE);  in al_fic_wire_init()
211 	writel_relaxed(control, fic->base + AL_FIC_CONTROL);  in al_fic_wire_init()
219 	pr_debug("%s initialized successfully in Legacy mode (parent-irq=%u)\n",  in al_fic_wire_init()
220 		 fic->name, parent_irq);  in al_fic_wire_init()
230 				 struct device_node *parent)  in al_fic_init_dt()  argument
233 	void __iomem *base;  in al_fic_init_dt()  local
237 	if (!parent) {  in al_fic_init_dt()
238 		pr_err("%s: unsupported - device require a parent\n",  in al_fic_init_dt()
239 		       node->name);  in al_fic_init_dt()
240 		return -EINVAL;  in al_fic_init_dt()
243 	base = of_iomap(node, 0);  in al_fic_init_dt()
244 	if (!base) {  in al_fic_init_dt()
245 		pr_err("%s: fail to map memory\n", node->name);  in al_fic_init_dt()
246 		return -ENOMEM;  in al_fic_init_dt()
251 		pr_err("%s: fail to map irq\n", node->name);  in al_fic_init_dt()
252 		ret = -EINVAL;  in al_fic_init_dt()
257 			       base,  in al_fic_init_dt()
258 			       node->name,  in al_fic_init_dt()
262 		       node->name,  in al_fic_init_dt()
273 	iounmap(base);  in al_fic_init_dt()
278 IRQCHIP_DECLARE(al_fic, "amazon,al-fic", al_fic_init_dt);