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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/*
* linux/arch/h8300/kernel/gpio.c
*
* Yoshinori Sato <ysato@users.sourceforge.jp>
*
*/
/*
* Internal I/O Port Management
*/
#include <linux/config.h>
#include <linux/stddef.h>
#include <linux/proc_fs.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/fs.h>
#include <linux/init.h>
#define _(addr) (volatile unsigned char *)(addr)
#if defined(CONFIG_H83007) || defined(CONFIG_H83068)
#include <asm/regs306x.h>
static volatile unsigned char *ddrs[] = {
_(P1DDR),_(P2DDR),_(P3DDR),_(P4DDR),_(P5DDR),_(P6DDR),
NULL, _(P8DDR),_(P9DDR),_(PADDR),_(PBDDR),
};
#define MAX_PORT 11
#endif
#if defined(CONFIG_H83002) || defined(CONFIG_H8048)
/* Fix me!! */
#include <asm/regs306x.h>
static volatile unsigned char *ddrs[] = {
_(P1DDR),_(P2DDR),_(P3DDR),_(P4DDR),_(P5DDR),_(P6DDR),
NULL, _(P8DDR),_(P9DDR),_(PADDR),_(PBDDR),
};
#define MAX_PORT 11
#endif
#if defined(CONFIG_H8S2678)
#include <asm/regs267x.h>
static volatile unsigned char *ddrs[] = {
_(P1DDR),_(P2DDR),_(P3DDR),NULL ,_(P5DDR),_(P6DDR),
_(P7DDR),_(P8DDR),NULL, _(PADDR),_(PBDDR),_(PCDDR),
_(PDDDR),_(PEDDR),_(PFDDR),_(PGDDR),_(PHDDR),
_(PADDR),_(PBDDR),_(PCDDR),_(PDDDR),_(PEDDR),_(PFDDR),
_(PGDDR),_(PHDDR)
};
#define MAX_PORT 17
#endif
#undef _
#if !defined(P1DDR)
#error Unsuppoted CPU Selection
#endif
static struct {
unsigned char used;
unsigned char ddr;
} gpio_regs[MAX_PORT];
extern char *_platform_gpio_table(int length);
int h8300_reserved_gpio(int port, unsigned int bits)
{
unsigned char *used;
if (port < 0 || port >= MAX_PORT)
return -1;
used = &(gpio_regs[port].used);
if ((*used & bits) != 0)
return 0;
*used |= bits;
return 1;
}
int h8300_free_gpio(int port, unsigned int bits)
{
unsigned char *used;
if (port < 0 || port >= MAX_PORT)
return -1;
used = &(gpio_regs[port].used);
if ((*used & bits) != bits)
return 0;
*used &= (~bits);
return 1;
}
int h8300_set_gpio_dir(int port_bit,int dir)
{
int port = (port_bit >> 8) & 0xff;
int bit = port_bit & 0xff;
if (ddrs[port] == NULL)
return 0;
if (gpio_regs[port].used & bit) {
if (dir)
gpio_regs[port].ddr |= bit;
else
gpio_regs[port].ddr &= ~bit;
*ddrs[port] = gpio_regs[port].ddr;
return 1;
} else
return 0;
}
int h8300_get_gpio_dir(int port_bit)
{
int port = (port_bit >> 8) & 0xff;
int bit = port_bit & 0xff;
if (ddrs[port] == NULL)
return 0;
if (gpio_regs[port].used & bit) {
return (gpio_regs[port].ddr & bit) != 0;
} else
return -1;
}
#if defined(CONFIG_PROC_FS)
static char *port_status(int portno)
{
static char result[10];
static const char io[2]={'I','O'};
char *rp;
int c;
unsigned char used,ddr;
used = gpio_regs[portno].used;
ddr = gpio_regs[portno].ddr;
result[8]='\0';
rp = result + 7;
for (c = 8; c > 0; c--,rp--,used >>= 1, ddr >>= 1)
if (used & 0x01)
*rp = io[ ddr & 0x01];
else
*rp = '-';
return result;
}
static int gpio_proc_read(char *buf, char **start, off_t offset,
int len, int *unused_i, void *unused_v)
{
int c,outlen;
static const char port_name[]="123456789ABCDEFGH";
outlen = 0;
for (c = 0; c < MAX_PORT; c++) {
if (ddrs[c] == NULL)
continue ;
len = sprintf(buf,"P%c: %s\n",port_name[c],port_status(c));
buf += len;
outlen += len;
}
return outlen;
}
static __init int register_proc(void)
{
struct proc_dir_entry *proc_gpio;
proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
if (proc_gpio)
proc_gpio->read_proc = gpio_proc_read;
return proc_gpio != NULL;
}
__initcall(register_proc);
#endif
void __init h8300_gpio_init(void)
{
memcpy(gpio_regs,_platform_gpio_table(sizeof(gpio_regs)),sizeof(gpio_regs));
}
|
