Blame view
drivers/irqchip/irq-mtk-sysirq.c
5.74 KB
1802d0bee treewide: Replace... |
1 |
// SPDX-License-Identifier: GPL-2.0-only |
5fe3bba30 irqchip: mtk-sysi... |
2 3 4 |
/* * Copyright (c) 2014 MediaTek Inc. * Author: Joe.C <yingjoe.chen@mediatek.com> |
5fe3bba30 irqchip: mtk-sysi... |
5 6 7 |
*/ #include <linux/irq.h> |
41a83e06e irqchip: Prepare ... |
8 |
#include <linux/irqchip.h> |
5fe3bba30 irqchip: mtk-sysi... |
9 10 11 12 13 14 15 |
#include <linux/irqdomain.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/of_address.h> #include <linux/io.h> #include <linux/slab.h> #include <linux/spinlock.h> |
5fe3bba30 irqchip: mtk-sysi... |
16 17 |
struct mtk_sysirq_chip_data { spinlock_t lock; |
13683f9bb irqchip/mtk-sysir... |
18 19 20 21 22 |
u32 nr_intpol_bases; void __iomem **intpol_bases; u32 *intpol_words; u8 *intpol_idx; u16 *which_word; |
5fe3bba30 irqchip: mtk-sysi... |
23 24 25 26 27 28 |
}; static int mtk_sysirq_set_type(struct irq_data *data, unsigned int type) { irq_hw_number_t hwirq = data->hwirq; struct mtk_sysirq_chip_data *chip_data = data->chip_data; |
13683f9bb irqchip/mtk-sysir... |
29 30 |
u8 intpol_idx = chip_data->intpol_idx[hwirq]; void __iomem *base; |
5fe3bba30 irqchip: mtk-sysi... |
31 32 33 |
u32 offset, reg_index, value; unsigned long flags; int ret; |
13683f9bb irqchip/mtk-sysir... |
34 35 |
base = chip_data->intpol_bases[intpol_idx]; reg_index = chip_data->which_word[hwirq]; |
5fe3bba30 irqchip: mtk-sysi... |
36 |
offset = hwirq & 0x1f; |
5fe3bba30 irqchip: mtk-sysi... |
37 38 |
spin_lock_irqsave(&chip_data->lock, flags); |
13683f9bb irqchip/mtk-sysir... |
39 |
value = readl_relaxed(base + reg_index * 4); |
5fe3bba30 irqchip: mtk-sysi... |
40 41 42 43 44 45 46 47 48 |
if (type == IRQ_TYPE_LEVEL_LOW || type == IRQ_TYPE_EDGE_FALLING) { if (type == IRQ_TYPE_LEVEL_LOW) type = IRQ_TYPE_LEVEL_HIGH; else type = IRQ_TYPE_EDGE_RISING; value |= (1 << offset); } else { value &= ~(1 << offset); } |
13683f9bb irqchip/mtk-sysir... |
49 |
|
5e11d16c2 irqchip/mtk-sysir... |
50 |
writel_relaxed(value, base + reg_index * 4); |
5fe3bba30 irqchip: mtk-sysi... |
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 |
data = data->parent_data; ret = data->chip->irq_set_type(data, type); spin_unlock_irqrestore(&chip_data->lock, flags); return ret; } static struct irq_chip mtk_sysirq_chip = { .name = "MT_SYSIRQ", .irq_mask = irq_chip_mask_parent, .irq_unmask = irq_chip_unmask_parent, .irq_eoi = irq_chip_eoi_parent, .irq_set_type = mtk_sysirq_set_type, .irq_retrigger = irq_chip_retrigger_hierarchy, .irq_set_affinity = irq_chip_set_affinity_parent, }; |
f833f57ff irqchip: Convert ... |
67 68 69 70 |
static int mtk_sysirq_domain_translate(struct irq_domain *d, struct irq_fwspec *fwspec, unsigned long *hwirq, unsigned int *type) |
5fe3bba30 irqchip: mtk-sysi... |
71 |
{ |
f833f57ff irqchip: Convert ... |
72 73 74 |
if (is_of_node(fwspec->fwnode)) { if (fwspec->param_count != 3) return -EINVAL; |
5fe3bba30 irqchip: mtk-sysi... |
75 |
|
f833f57ff irqchip: Convert ... |
76 77 78 79 80 81 82 83 |
/* No PPI should point to this domain */ if (fwspec->param[0] != 0) return -EINVAL; *hwirq = fwspec->param[1]; *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK; return 0; } |
5fe3bba30 irqchip: mtk-sysi... |
84 |
|
f833f57ff irqchip: Convert ... |
85 |
return -EINVAL; |
5fe3bba30 irqchip: mtk-sysi... |
86 87 88 89 90 91 92 |
} static int mtk_sysirq_domain_alloc(struct irq_domain *domain, unsigned int virq, unsigned int nr_irqs, void *arg) { int i; irq_hw_number_t hwirq; |
f833f57ff irqchip: Convert ... |
93 94 |
struct irq_fwspec *fwspec = arg; struct irq_fwspec gic_fwspec = *fwspec; |
5fe3bba30 irqchip: mtk-sysi... |
95 |
|
f833f57ff irqchip: Convert ... |
96 |
if (fwspec->param_count != 3) |
5fe3bba30 irqchip: mtk-sysi... |
97 98 99 |
return -EINVAL; /* sysirq doesn't support PPI */ |
f833f57ff irqchip: Convert ... |
100 |
if (fwspec->param[0]) |
5fe3bba30 irqchip: mtk-sysi... |
101 |
return -EINVAL; |
f833f57ff irqchip: Convert ... |
102 |
hwirq = fwspec->param[1]; |
5fe3bba30 irqchip: mtk-sysi... |
103 104 105 106 |
for (i = 0; i < nr_irqs; i++) irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i, &mtk_sysirq_chip, domain->host_data); |
f833f57ff irqchip: Convert ... |
107 108 |
gic_fwspec.fwnode = domain->parent->fwnode; return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &gic_fwspec); |
5fe3bba30 irqchip: mtk-sysi... |
109 |
} |
960097365 irqchip: Constify... |
110 |
static const struct irq_domain_ops sysirq_domain_ops = { |
f833f57ff irqchip: Convert ... |
111 112 113 |
.translate = mtk_sysirq_domain_translate, .alloc = mtk_sysirq_domain_alloc, .free = irq_domain_free_irqs_common, |
5fe3bba30 irqchip: mtk-sysi... |
114 115 116 117 118 119 120 |
}; static int __init mtk_sysirq_of_init(struct device_node *node, struct device_node *parent) { struct irq_domain *domain, *domain_parent; struct mtk_sysirq_chip_data *chip_data; |
13683f9bb irqchip/mtk-sysir... |
121 |
int ret, size, intpol_num = 0, nr_intpol_bases = 0, i = 0; |
5fe3bba30 irqchip: mtk-sysi... |
122 123 124 125 126 127 128 129 130 131 132 |
domain_parent = irq_find_host(parent); if (!domain_parent) { pr_err("mtk_sysirq: interrupt-parent not found "); return -EINVAL; } chip_data = kzalloc(sizeof(*chip_data), GFP_KERNEL); if (!chip_data) return -ENOMEM; |
13683f9bb irqchip/mtk-sysir... |
133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 |
while (of_get_address(node, i++, NULL, NULL)) nr_intpol_bases++; if (nr_intpol_bases == 0) { pr_err("mtk_sysirq: base address not specified "); ret = -EINVAL; goto out_free_chip; } chip_data->intpol_words = kcalloc(nr_intpol_bases, sizeof(*chip_data->intpol_words), GFP_KERNEL); if (!chip_data->intpol_words) { ret = -ENOMEM; goto out_free_chip; } chip_data->intpol_bases = kcalloc(nr_intpol_bases, sizeof(*chip_data->intpol_bases), GFP_KERNEL); if (!chip_data->intpol_bases) { ret = -ENOMEM; goto out_free_intpol_words; } for (i = 0; i < nr_intpol_bases; i++) { struct resource res; ret = of_address_to_resource(node, i, &res); size = resource_size(&res); intpol_num += size * 8; chip_data->intpol_words[i] = size / 4; chip_data->intpol_bases[i] = of_iomap(node, i); if (ret || !chip_data->intpol_bases[i]) { |
e81f54c66 irqchip: Convert ... |
168 169 |
pr_err("%pOF: couldn't map region %d ", node, i); |
13683f9bb irqchip/mtk-sysir... |
170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 |
ret = -ENODEV; goto out_free_intpol; } } chip_data->intpol_idx = kcalloc(intpol_num, sizeof(*chip_data->intpol_idx), GFP_KERNEL); if (!chip_data->intpol_idx) { ret = -ENOMEM; goto out_free_intpol; } chip_data->which_word = kcalloc(intpol_num, sizeof(*chip_data->which_word), GFP_KERNEL); if (!chip_data->which_word) { ret = -ENOMEM; goto out_free_intpol_idx; } /* * assign an index of the intpol_bases for each irq * to set it fast later */ for (i = 0; i < intpol_num ; i++) { u32 word = i / 32, j; for (j = 0; word >= chip_data->intpol_words[j] ; j++) word -= chip_data->intpol_words[j]; chip_data->intpol_idx[i] = j; chip_data->which_word[i] = word; |
5fe3bba30 irqchip: mtk-sysi... |
203 |
} |
cdb647a77 irqchip: mtk-sysi... |
204 |
domain = irq_domain_add_hierarchy(domain_parent, 0, intpol_num, node, |
5fe3bba30 irqchip: mtk-sysi... |
205 206 207 |
&sysirq_domain_ops, chip_data); if (!domain) { ret = -ENOMEM; |
13683f9bb irqchip/mtk-sysir... |
208 |
goto out_free_which_word; |
5fe3bba30 irqchip: mtk-sysi... |
209 210 211 212 |
} spin_lock_init(&chip_data->lock); return 0; |
13683f9bb irqchip/mtk-sysir... |
213 214 215 216 217 218 219 220 221 222 223 224 |
out_free_which_word: kfree(chip_data->which_word); out_free_intpol_idx: kfree(chip_data->intpol_idx); out_free_intpol: for (i = 0; i < nr_intpol_bases; i++) if (chip_data->intpol_bases[i]) iounmap(chip_data->intpol_bases[i]); kfree(chip_data->intpol_bases); out_free_intpol_words: kfree(chip_data->intpol_words); out_free_chip: |
5fe3bba30 irqchip: mtk-sysi... |
225 226 227 228 |
kfree(chip_data); return ret; } IRQCHIP_DECLARE(mtk_sysirq, "mediatek,mt6577-sysirq", mtk_sysirq_of_init); |