1 /*
2 * Copyright (c) 2008, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <boot/boot.h>
30 #include <msm7k/vic.h>
31 #include <msm7k/irqs.h>
32
33 extern irq_handler irq_vector_table[NR_IRQS];
34
unknown_handler(unsigned n)35 void unknown_handler(unsigned n)
36 {
37 dprintf("unsolicited irq #%d\n", n);
38 for(;;);
39 }
40
irq_init(void)41 void irq_init(void)
42 {
43 unsigned n;
44
45 for(n = 0; n < NR_IRQS; n++) {
46 irq_vector_table[n] = unknown_handler;
47 }
48 /* select level interrupts */
49 writel(0, VIC_INT_TYPE0);
50 writel(0, VIC_INT_TYPE1);
51
52 /* select IRQ for all INTs */
53 writel(0, VIC_INT_SELECT0);
54 writel(0, VIC_INT_SELECT1);
55
56 /* clear interrupts */
57 writel(0xffffffff, VIC_INT_CLEAR0);
58 writel(0xffffffff, VIC_INT_CLEAR1);
59
60 /* disable all INTs */
61 writel(0, VIC_INT_EN0);
62 writel(0, VIC_INT_EN1);
63
64 /* don't use 1136 vic */
65 writel(0, VIC_CONFIG);
66
67 writel(1, VIC_INT_MASTEREN);
68
69 /* enable IRQs */
70 enable_irq();
71
72 (void) readl(VIC_IRQ_VEC_RD);
73 }
74
irq_unmask(unsigned n)75 void irq_unmask(unsigned n)
76 {
77 unsigned reg, bit;
78
79 reg = n > 31 ? VIC_INT_EN1 : VIC_INT_EN0;
80 bit = 1 << (n & 31);
81
82 writel(readl(reg) | bit, reg);
83 }
84
irq_mask(unsigned n)85 void irq_mask(unsigned n)
86 {
87 unsigned reg, bit;
88
89 reg = n > 31 ? VIC_INT_ENCLEAR1 : VIC_INT_ENCLEAR0;
90 bit = 1 << (n & 31);
91
92 writel(bit, reg);
93 }
94
irq_install(unsigned n,irq_handler func,int edge)95 void irq_install(unsigned n, irq_handler func, int edge)
96 {
97 unsigned reg, bit, tmp;
98
99 reg = n > 31 ? VIC_INT_TYPE1 : VIC_INT_TYPE0;
100 bit = 1 << (n & 31);
101
102 tmp = readl(reg);
103 if(edge) {
104 writel(tmp | bit, reg);
105 } else {
106 writel(tmp & (~bit), reg);
107 }
108
109 irq_vector_table[n] = func;
110 }
111
112