1 // SPDX-License-Identifier: GPL-2.0
3 #define pr_fmt(fmt) "irq-ls-extirq: " fmt
12 #include <dt-bindings/interrupt-controller/arm-gic.h>
23 	struct irq_fwspec	map[MAXIRQ];  member
26 static void ls_extirq_intpcr_rmw(struct ls_extirq_data *priv, u32 mask,  in ls_extirq_intpcr_rmw()  argument
33 	 * IRQ descriptors, making sure the read-modify-write is atomic.  in ls_extirq_intpcr_rmw()
35 	raw_spin_lock(&priv->lock);  in ls_extirq_intpcr_rmw()
37 	if (priv->big_endian)  in ls_extirq_intpcr_rmw()
38 		intpcr = ioread32be(priv->intpcr);  in ls_extirq_intpcr_rmw()
40 		intpcr = ioread32(priv->intpcr);  in ls_extirq_intpcr_rmw()
42 	intpcr &= ~mask;  in ls_extirq_intpcr_rmw()
45 	if (priv->big_endian)  in ls_extirq_intpcr_rmw()
46 		iowrite32be(intpcr, priv->intpcr);  in ls_extirq_intpcr_rmw()
48 		iowrite32(intpcr, priv->intpcr);  in ls_extirq_intpcr_rmw()
50 	raw_spin_unlock(&priv->lock);  in ls_extirq_intpcr_rmw()
53 static int
54 ls_extirq_set_type(struct irq_data *data, unsigned int type)  in ls_extirq_set_type()
56 	struct ls_extirq_data *priv = data->chip_data;  in ls_extirq_set_type()
57 	irq_hw_number_t hwirq = data->hwirq;  in ls_extirq_set_type()
58 	u32 value, mask;  in ls_extirq_set_type()  local
60 	if (priv->is_ls1021a_or_ls1043a)  in ls_extirq_set_type()
61 		mask = 1U << (31 - hwirq);  in ls_extirq_set_type()
63 		mask = 1U << hwirq;  in ls_extirq_set_type()
68 		value = mask;  in ls_extirq_set_type()
72 		value = mask;  in ls_extirq_set_type()
79 		return -EINVAL;  in ls_extirq_set_type()
82 	ls_extirq_intpcr_rmw(priv, mask, value);  in ls_extirq_set_type()
88 	.name			= "ls-extirq",
98 static int
99 ls_extirq_domain_alloc(struct irq_domain *domain, unsigned int virq,  in ls_extirq_domain_alloc()
100 		       unsigned int nr_irqs, void *arg)  in ls_extirq_domain_alloc()
102 	struct ls_extirq_data *priv = domain->host_data;  in ls_extirq_domain_alloc()
106 	if (fwspec->param_count != 2)  in ls_extirq_domain_alloc()
107 		return -EINVAL;  in ls_extirq_domain_alloc()
109 	hwirq = fwspec->param[0];  in ls_extirq_domain_alloc()
110 	if (hwirq >= priv->nirq)  in ls_extirq_domain_alloc()
111 		return -EINVAL;  in ls_extirq_domain_alloc()
116 	return irq_domain_alloc_irqs_parent(domain, virq, 1, &priv->map[hwirq]);  in ls_extirq_domain_alloc()
125 static int
128 	const __be32 *map;  in ls_extirq_parse_map()  local
130 	int ret;  in ls_extirq_parse_map()
132 	map = of_get_property(node, "interrupt-map", &mapsize);  in ls_extirq_parse_map()
133 	if (!map)  in ls_extirq_parse_map()
134 		return -ENOENT;  in ls_extirq_parse_map()
135 	if (mapsize % sizeof(*map))  in ls_extirq_parse_map()
136 		return -EINVAL;  in ls_extirq_parse_map()
137 	mapsize /= sizeof(*map);  in ls_extirq_parse_map()
144 			return -EINVAL;  in ls_extirq_parse_map()
145 		hwirq = be32_to_cpup(map);  in ls_extirq_parse_map()
147 			return -EINVAL;  in ls_extirq_parse_map()
148 		priv->nirq = max(priv->nirq, hwirq + 1);  in ls_extirq_parse_map()
150 		ipar = of_find_node_by_phandle(be32_to_cpup(map + 2));  in ls_extirq_parse_map()
151 		map += 3;  in ls_extirq_parse_map()
152 		mapsize -= 3;  in ls_extirq_parse_map()
154 			return -EINVAL;  in ls_extirq_parse_map()
155 		priv->map[hwirq].fwnode = &ipar->fwnode;  in ls_extirq_parse_map()
156 		ret = of_property_read_u32(ipar, "#interrupt-cells", &intsize);  in ls_extirq_parse_map()
161 			return -EINVAL;  in ls_extirq_parse_map()
163 		priv->map[hwirq].param_count = intsize;  in ls_extirq_parse_map()
165 			priv->map[hwirq].param[j] = be32_to_cpup(map++);  in ls_extirq_parse_map()
166 		mapsize -= intsize;  in ls_extirq_parse_map()
171 static int __init
176 	int ret;  in ls_extirq_of_init()
181 		ret = -ENODEV;  in ls_extirq_of_init()
187 		ret = -ENOMEM;  in ls_extirq_of_init()
195 	priv->intpcr = of_iomap(node, 0);  in ls_extirq_of_init()
196 	if (!priv->intpcr) {  in ls_extirq_of_init()
198 		ret = -ENOMEM;  in ls_extirq_of_init()
206 	priv->big_endian = of_device_is_big_endian(node->parent);  in ls_extirq_of_init()
207 	priv->is_ls1021a_or_ls1043a = of_device_is_compatible(node, "fsl,ls1021a-extirq") ||  in ls_extirq_of_init()
208 				      of_device_is_compatible(node, "fsl,ls1043a-extirq");  in ls_extirq_of_init()
209 	raw_spin_lock_init(&priv->lock);  in ls_extirq_of_init()
211 	domain = irq_domain_add_hierarchy(parent_domain, 0, priv->nirq, node,  in ls_extirq_of_init()
214 		ret = -ENOMEM;  in ls_extirq_of_init()
222 	iounmap(priv->intpcr);  in ls_extirq_of_init()
230 IRQCHIP_DECLARE(ls1021a_extirq, "fsl,ls1021a-extirq", ls_extirq_of_init);
231 IRQCHIP_DECLARE(ls1043a_extirq, "fsl,ls1043a-extirq", ls_extirq_of_init);
232 IRQCHIP_DECLARE(ls1088a_extirq, "fsl,ls1088a-extirq", ls_extirq_of_init);