irq-crossbar.c (8b09a45dc12f83f2312a47f0f0087ec4004ebacc) irq-crossbar.c (2f7d2fb71dd0c14f9c0fe66f2ed7b4685fa745e2)
1/*
2 * drivers/irqchip/irq-crossbar.c
3 *
4 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
5 * Author: Sricharan R <r.sricharan@ti.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as

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21#define IRQ_RESERVED -2
22#define IRQ_SKIP -3
23#define GIC_IRQ_START 32
24
25/**
26 * struct crossbar_device - crossbar device description
27 * @int_max: maximum number of supported interrupts
28 * @safe_map: safe default value to initialize the crossbar
1/*
2 * drivers/irqchip/irq-crossbar.c
3 *
4 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
5 * Author: Sricharan R <r.sricharan@ti.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as

--- 12 unchanged lines hidden (view full) ---

21#define IRQ_RESERVED -2
22#define IRQ_SKIP -3
23#define GIC_IRQ_START 32
24
25/**
26 * struct crossbar_device - crossbar device description
27 * @int_max: maximum number of supported interrupts
28 * @safe_map: safe default value to initialize the crossbar
29 * @max_crossbar_sources: Maximum number of crossbar sources
29 * @irq_map: array of interrupts to crossbar number mapping
30 * @crossbar_base: crossbar base address
31 * @register_offsets: offsets for each irq number
32 * @write: register write function pointer
33 */
34struct crossbar_device {
35 uint int_max;
36 uint safe_map;
30 * @irq_map: array of interrupts to crossbar number mapping
31 * @crossbar_base: crossbar base address
32 * @register_offsets: offsets for each irq number
33 * @write: register write function pointer
34 */
35struct crossbar_device {
36 uint int_max;
37 uint safe_map;
38 uint max_crossbar_sources;
37 uint *irq_map;
38 void __iomem *crossbar_base;
39 int *register_offsets;
40 void (*write)(int, int);
41};
42
43static struct crossbar_device *cb;
44

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112
113static int crossbar_domain_xlate(struct irq_domain *d,
114 struct device_node *controller,
115 const u32 *intspec, unsigned int intsize,
116 unsigned long *out_hwirq,
117 unsigned int *out_type)
118{
119 int ret;
39 uint *irq_map;
40 void __iomem *crossbar_base;
41 int *register_offsets;
42 void (*write)(int, int);
43};
44
45static struct crossbar_device *cb;
46

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114
115static int crossbar_domain_xlate(struct irq_domain *d,
116 struct device_node *controller,
117 const u32 *intspec, unsigned int intsize,
118 unsigned long *out_hwirq,
119 unsigned int *out_type)
120{
121 int ret;
122 int req_num = intspec[1];
120
123
121 ret = get_prev_map_irq(intspec[1]);
124 if (req_num >= cb->max_crossbar_sources) {
125 pr_err("%s: requested crossbar number %d > max %d\n",
126 __func__, req_num, cb->max_crossbar_sources);
127 return -EINVAL;
128 }
129
130 ret = get_prev_map_irq(req_num);
122 if (ret >= 0)
123 goto found;
124
131 if (ret >= 0)
132 goto found;
133
125 ret = allocate_free_irq(intspec[1]);
134 ret = allocate_free_irq(req_num);
126
127 if (ret < 0)
128 return ret;
129
130found:
131 *out_hwirq = ret + GIC_IRQ_START;
132 return 0;
133}

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148
149 if (!cb)
150 return ret;
151
152 cb->crossbar_base = of_iomap(node, 0);
153 if (!cb->crossbar_base)
154 goto err_cb;
155
135
136 if (ret < 0)
137 return ret;
138
139found:
140 *out_hwirq = ret + GIC_IRQ_START;
141 return 0;
142}

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157
158 if (!cb)
159 return ret;
160
161 cb->crossbar_base = of_iomap(node, 0);
162 if (!cb->crossbar_base)
163 goto err_cb;
164
165 of_property_read_u32(node, "ti,max-crossbar-sources",
166 &cb->max_crossbar_sources);
167 if (!cb->max_crossbar_sources) {
168 pr_err("missing 'ti,max-crossbar-sources' property\n");
169 ret = -EINVAL;
170 goto err_base;
171 }
172
156 of_property_read_u32(node, "ti,max-irqs", &max);
157 if (!max) {
158 pr_err("missing 'ti,max-irqs' property\n");
159 ret = -EINVAL;
160 goto err_base;
161 }
162 cb->irq_map = kcalloc(max, sizeof(int), GFP_KERNEL);
163 if (!cb->irq_map)

--- 120 unchanged lines hidden --- 		173 of_property_read_u32(node, "ti,max-irqs", &max);
174 if (!max) {
175 pr_err("missing 'ti,max-irqs' property\n");
176 ret = -EINVAL;
177 goto err_base;
178 }
179 cb->irq_map = kcalloc(max, sizeof(int), GFP_KERNEL);
180 if (!cb->irq_map)

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