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12#include <linux/stddef.h>
13#include <linux/proc_fs.h>
14#include <linux/seq_file.h>
15#include <linux/kernel.h>
16#include <linux/string.h>
17#include <linux/fs.h>
18#include <linux/init.h>
19
20#define _(addr) (volatile unsigned char *)(addr)
21#if defined(CONFIG_H83007) || defined(CONFIG_H83068)
22#include <asm/regs306x.h>
23static volatile unsigned char *ddrs[] = {
24 _(P1DDR),_(P2DDR),_(P3DDR),_(P4DDR),_(P5DDR),_(P6DDR),
25 NULL, _(P8DDR),_(P9DDR),_(PADDR),_(PBDDR),
26};
27#define MAX_PORT 11
28#endif
29
30 #if defined(CONFIG_H83002) || defined(CONFIG_H8048)
31
32#include <asm/regs306x.h>
33static volatile unsigned char *ddrs[] = {
34 _(P1DDR),_(P2DDR),_(P3DDR),_(P4DDR),_(P5DDR),_(P6DDR),
35 NULL, _(P8DDR),_(P9DDR),_(PADDR),_(PBDDR),
36};
37#define MAX_PORT 11
38#endif
39
40#if defined(CONFIG_H8S2678)
41#include <asm/regs267x.h>
42static volatile unsigned char *ddrs[] = {
43 _(P1DDR),_(P2DDR),_(P3DDR),NULL ,_(P5DDR),_(P6DDR),
44 _(P7DDR),_(P8DDR),NULL, _(PADDR),_(PBDDR),_(PCDDR),
45 _(PDDDR),_(PEDDR),_(PFDDR),_(PGDDR),_(PHDDR),
46 _(PADDR),_(PBDDR),_(PCDDR),_(PDDDR),_(PEDDR),_(PFDDR),
47 _(PGDDR),_(PHDDR)
48};
49#define MAX_PORT 17
50#endif
51#undef _
52
53#if !defined(P1DDR)
54#error Unsuppoted CPU Selection
55#endif
56
57static struct {
58 unsigned char used;
59 unsigned char ddr;
60} gpio_regs[MAX_PORT];
61
62extern char *_platform_gpio_table(int length);
63
64int h8300_reserved_gpio(int port, unsigned int bits)
65{
66 unsigned char *used;
67
68 if (port < 0 || port >= MAX_PORT)
69 return -1;
70 used = &(gpio_regs[port].used);
71 if ((*used & bits) != 0)
72 return 0;
73 *used |= bits;
74 return 1;
75}
76
77int h8300_free_gpio(int port, unsigned int bits)
78{
79 unsigned char *used;
80
81 if (port < 0 || port >= MAX_PORT)
82 return -1;
83 used = &(gpio_regs[port].used);
84 if ((*used & bits) != bits)
85 return 0;
86 *used &= (~bits);
87 return 1;
88}
89
90int h8300_set_gpio_dir(int port_bit,int dir)
91{
92 int port = (port_bit >> 8) & 0xff;
93 int bit = port_bit & 0xff;
94
95 if (ddrs[port] == NULL)
96 return 0;
97 if (gpio_regs[port].used & bit) {
98 if (dir)
99 gpio_regs[port].ddr |= bit;
100 else
101 gpio_regs[port].ddr &= ~bit;
102 *ddrs[port] = gpio_regs[port].ddr;
103 return 1;
104 } else
105 return 0;
106}
107
108int h8300_get_gpio_dir(int port_bit)
109{
110 int port = (port_bit >> 8) & 0xff;
111 int bit = port_bit & 0xff;
112
113 if (ddrs[port] == NULL)
114 return 0;
115 if (gpio_regs[port].used & bit) {
116 return (gpio_regs[port].ddr & bit) != 0;
117 } else
118 return -1;
119}
120
121#if defined(CONFIG_PROC_FS)
122static char *port_status(int portno)
123{
124 static char result[10];
125 static const char io[2]={'I','O'};
126 char *rp;
127 int c;
128 unsigned char used,ddr;
129
130 used = gpio_regs[portno].used;
131 ddr = gpio_regs[portno].ddr;
132 result[8]='\0';
133 rp = result + 7;
134 for (c = 8; c > 0; c--,rp--,used >>= 1, ddr >>= 1)
135 if (used & 0x01)
136 *rp = io[ ddr & 0x01];
137 else
138 *rp = '-';
139 return result;
140}
141
142static int gpio_proc_show(struct seq_file *m, void *v)
143{
144 static const char port_name[]="123456789ABCDEFGH";
145 int c;
146
147 for (c = 0; c < MAX_PORT; c++) {
148 if (ddrs[c] == NULL)
149 continue;
150 seq_printf(m, "P%c: %s\n", port_name[c], port_status(c));
151 }
152 return 0;
153}
154
155static int gpio_proc_open(struct inode *inode, struct file *file)
156{
157 return single_open(file, gpio_proc_show, PDE_DATA(inode));
158}
159
160static const struct file_operations gpio_proc_fops = {
161 .open = gpio_proc_open,
162 .read = seq_read,
163 .llseek = seq_lseek,
164 .release = single_release,
165};
166
167static __init int register_proc(void)
168{
169 return proc_create("gpio", S_IRUGO, NULL, &gpio_proc_fops) != NULL;
170}
171
172__initcall(register_proc);
173#endif
174
175void __init h8300_gpio_init(void)
176{
177 memcpy(gpio_regs,_platform_gpio_table(sizeof(gpio_regs)),sizeof(gpio_regs));
178}
179
