1 /* arch/arm/mach-lh7a40x/arch-kev7a400.c
2 *
3 * Copyright (C) 2004 Logic Product Development
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * version 2 as published by the Free Software Foundation.
8 *
9 */
10
11 #include <linux/tty.h>
12 #include <linux/init.h>
13 #include <linux/device.h>
14 #include <linux/interrupt.h>
15
16 #include <asm/hardware.h>
17 #include <asm/setup.h>
18 #include <asm/mach-types.h>
19 #include <asm/mach/arch.h>
20 #include <asm/irq.h>
21 #include <asm/mach/irq.h>
22 #include <asm/mach/map.h>
23
24 #include "common.h"
25
26 /* This function calls the board specific IRQ initialization function. */
27
28 static struct map_desc kev7a400_io_desc[] __initdata = {
29 {
30 .virtual = IO_VIRT,
31 .pfn = __phys_to_pfn(IO_PHYS),
32 .length = IO_SIZE,
33 .type = MT_DEVICE
34 }, {
35 .virtual = CPLD_VIRT,
36 .pfn = __phys_to_pfn(CPLD_PHYS),
37 .length = CPLD_SIZE,
38 .type = MT_DEVICE
39 }
40 };
41
42 void __init kev7a400_map_io(void)
43 {
44 iotable_init (kev7a400_io_desc, ARRAY_SIZE (kev7a400_io_desc));
45 }
46
47 static u16 CPLD_IRQ_mask; /* Mask for CPLD IRQs, 1 == unmasked */
48
49 static void kev7a400_ack_cpld_irq (u32 irq)
50 {
51 CPLD_CL_INT = 1 << (irq - IRQ_KEV7A400_CPLD);
52 }
53
54 static void kev7a400_mask_cpld_irq (u32 irq)
55 {
56 CPLD_IRQ_mask &= ~(1 << (irq - IRQ_KEV7A400_CPLD));
57 CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
58 }
59
60 static void kev7a400_unmask_cpld_irq (u32 irq)
61 {
62 CPLD_IRQ_mask |= 1 << (irq - IRQ_KEV7A400_CPLD);
63 CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
64 }
65
66 static struct irq_chip kev7a400_cpld_chip = {
67 .name = "CPLD",
68 .ack = kev7a400_ack_cpld_irq,
69 .mask = kev7a400_mask_cpld_irq,
70 .unmask = kev7a400_unmask_cpld_irq,
71 };
72
73
74 static void kev7a400_cpld_handler (unsigned int irq, struct irq_desc *desc)
75 {
76 u32 mask = CPLD_LATCHED_INTS;
77 irq = IRQ_KEV7A400_CPLD;
78 for (; mask; mask >>= 1, ++irq) {
79 if (mask & 1)
80 desc[irq].handle (irq, desc);
81 }
82 }
83
84 void __init lh7a40x_init_board_irq (void)
85 {
86 int irq;
87
88 for (irq = IRQ_KEV7A400_CPLD;
89 irq < IRQ_KEV7A400_CPLD + NR_IRQ_BOARD; ++irq) {
90 set_irq_chip (irq, &kev7a400_cpld_chip);
91 set_irq_handler (irq, handle_edge_irq);
92 set_irq_flags (irq, IRQF_VALID);
93 }
94 set_irq_chained_handler (IRQ_CPLD, kev7a400_cpld_handler);
95
96 /* Clear all CPLD interrupts */
97 CPLD_CL_INT = 0xff; /* CPLD_INTR_MMC_CD | CPLD_INTR_ETH_INT; */
98
99 GPIO_GPIOINTEN = 0; /* Disable all GPIO interrupts */
100 barrier();
101
102 #if 0
103 GPIO_INTTYPE1
104 = (GPIO_INTR_PCC1_CD | GPIO_INTR_PCC1_CD); /* Edge trig. */
105 GPIO_INTTYPE2 = 0; /* Falling edge & low-level */
106 GPIO_GPIOFEOI = 0xff; /* Clear all GPIO interrupts */
107 GPIO_GPIOINTEN = 0xff; /* Enable all GPIO interrupts */
108
109 init_FIQ();
110 #endif
111 }
112
113 MACHINE_START (KEV7A400, "Sharp KEV7a400")
114 /* Maintainer: Marc Singer */
115 .phys_io = 0x80000000,
116 .io_pg_offst = ((io_p2v (0x80000000))>>18) & 0xfffc,
117 .boot_params = 0xc0000100,
118 .map_io = kev7a400_map_io,
119 .init_irq = lh7a400_init_irq,
120 .timer = &lh7a40x_timer,
121 MACHINE_END
122
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