1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*
* arch/arm/mach-ns9xxx/board-a9m9750dev.c
*
* Copyright (C) 2006,2007 by Digi International Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/
#include <linux/irq.h>
#include <asm/mach/map.h>
#include <asm/gpio.h>
#include <mach/board.h>
#include <mach/processor-ns9360.h>
#include <mach/regs-sys-ns9360.h>
#include <mach/regs-mem.h>
#include <mach/regs-bbu.h>
#include <mach/regs-board-a9m9750dev.h>
#include "board-a9m9750dev.h"
static struct map_desc board_a9m9750dev_io_desc[] __initdata = {
{ /* FPGA on CS0 */
.virtual = io_p2v(NS9XXX_CSxSTAT_PHYS(0)),
.pfn = __phys_to_pfn(NS9XXX_CSxSTAT_PHYS(0)),
.length = NS9XXX_CS0STAT_LENGTH,
.type = MT_DEVICE,
},
};
void __init board_a9m9750dev_map_io(void)
{
iotable_init(board_a9m9750dev_io_desc,
ARRAY_SIZE(board_a9m9750dev_io_desc));
}
static void a9m9750dev_fpga_ack_irq(struct irq_data *d)
{
/* nothing */
}
static void a9m9750dev_fpga_mask_irq(struct irq_data *d)
{
u8 ier;
ier = __raw_readb(FPGA_IER);
ier &= ~(1 << (d->irq - FPGA_IRQ(0)));
__raw_writeb(ier, FPGA_IER);
}
static void a9m9750dev_fpga_maskack_irq(struct irq_data *d)
{
a9m9750dev_fpga_mask_irq(d);
a9m9750dev_fpga_ack_irq(d);
}
static void a9m9750dev_fpga_unmask_irq(struct irq_data *d)
{
u8 ier;
ier = __raw_readb(FPGA_IER);
ier |= 1 << (d->irq - FPGA_IRQ(0));
__raw_writeb(ier, FPGA_IER);
}
static struct irq_chip a9m9750dev_fpga_chip = {
.irq_ack = a9m9750dev_fpga_ack_irq,
.irq_mask = a9m9750dev_fpga_mask_irq,
.irq_mask_ack = a9m9750dev_fpga_maskack_irq,
.irq_unmask = a9m9750dev_fpga_unmask_irq,
};
static void a9m9750dev_fpga_demux_handler(unsigned int irq,
struct irq_desc *desc)
{
u8 stat = __raw_readb(FPGA_ISR);
desc->irq_data.chip->irq_mask_ack(&desc->irq_data);
while (stat != 0) {
int irqno = fls(stat) - 1;
stat &= ~(1 << irqno);
generic_handle_irq(FPGA_IRQ(irqno));
}
desc->irq_data.chip->irq_unmask(&desc->irq_data);
}
void __init board_a9m9750dev_init_irq(void)
{
u32 eic;
int i;
if (gpio_request(11, "board a9m9750dev extirq2") == 0)
ns9360_gpio_configure(11, 0, 1);
else
printk(KERN_ERR "%s: cannot get gpio 11 for IRQ_NS9XXX_EXT2\n",
__func__);
for (i = FPGA_IRQ(0); i <= FPGA_IRQ(7); ++i) {
irq_set_chip(i, &a9m9750dev_fpga_chip);
irq_set_handler(i, handle_level_irq);
set_irq_flags(i, IRQF_VALID);
}
/* IRQ_NS9XXX_EXT2: level sensitive + active low */
eic = __raw_readl(SYS_EIC(2));
REGSET(eic, SYS_EIC, PLTY, AL);
REGSET(eic, SYS_EIC, LVEDG, LEVEL);
__raw_writel(eic, SYS_EIC(2));
irq_set_chained_handler(IRQ_NS9XXX_EXT2,
a9m9750dev_fpga_demux_handler);
}
void __init board_a9m9750dev_init_machine(void)
{
u32 reg;
/* setup static CS0: memory base ... */
reg = __raw_readl(SYS_SMCSSMB(0));
REGSETIM(reg, SYS_SMCSSMB, CSxB, NS9XXX_CSxSTAT_PHYS(0) >> 12);
__raw_writel(reg, SYS_SMCSSMB(0));
/* ... and mask */
reg = __raw_readl(SYS_SMCSSMM(0));
REGSETIM(reg, SYS_SMCSSMM, CSxM, 0xfffff);
REGSET(reg, SYS_SMCSSMM, CSEx, EN);
__raw_writel(reg, SYS_SMCSSMM(0));
/* setup static CS0: memory configuration */
reg = __raw_readl(MEM_SMC(0));
REGSET(reg, MEM_SMC, PSMC, OFF);
REGSET(reg, MEM_SMC, BSMC, OFF);
REGSET(reg, MEM_SMC, EW, OFF);
REGSET(reg, MEM_SMC, PB, 1);
REGSET(reg, MEM_SMC, PC, AL);
REGSET(reg, MEM_SMC, PM, DIS);
REGSET(reg, MEM_SMC, MW, 8);
__raw_writel(reg, MEM_SMC(0));
/* setup static CS0: timing */
__raw_writel(0x2, MEM_SMWED(0));
__raw_writel(0x2, MEM_SMOED(0));
__raw_writel(0x6, MEM_SMRD(0));
__raw_writel(0x6, MEM_SMWD(0));
}
|
