1 /*
2 * Helper functions for I/O pins.
3 *
4 * Copyright (c) 2005-2007 Axis Communications AB.
5 */
6
7 #include <linux/types.h>
8 #include <linux/errno.h>
9 #include <linux/init.h>
10 #include <linux/string.h>
11 #include <linux/ctype.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <asm/io.h>
15 #include <mach/pinmux.h>
16 #include <hwregs/gio_defs.h>
17
18 struct crisv32_ioport crisv32_ioports[] = {
19 {
20 (unsigned long *)REG_ADDR(gio, regi_gio, rw_pa_oe),
21 (unsigned long *)REG_ADDR(gio, regi_gio, rw_pa_dout),
22 (unsigned long *)REG_ADDR(gio, regi_gio, r_pa_din),
23 32
24 },
25 {
26 (unsigned long *)REG_ADDR(gio, regi_gio, rw_pb_oe),
27 (unsigned long *)REG_ADDR(gio, regi_gio, rw_pb_dout),
28 (unsigned long *)REG_ADDR(gio, regi_gio, r_pb_din),
29 32
30 },
31 {
32 (unsigned long *)REG_ADDR(gio, regi_gio, rw_pc_oe),
33 (unsigned long *)REG_ADDR(gio, regi_gio, rw_pc_dout),
34 (unsigned long *)REG_ADDR(gio, regi_gio, r_pc_din),
35 16
36 },
37 };
38
39 #define NBR_OF_PORTS ARRAY_SIZE(crisv32_ioports)
40
41 struct crisv32_iopin crisv32_led_net0_green;
42 struct crisv32_iopin crisv32_led_net0_red;
43 struct crisv32_iopin crisv32_led2_green;
44 struct crisv32_iopin crisv32_led2_red;
45 struct crisv32_iopin crisv32_led3_green;
46 struct crisv32_iopin crisv32_led3_red;
47
48 /* Dummy port used when green LED and red LED is on the same bit */
49 static unsigned long io_dummy;
50 static struct crisv32_ioport dummy_port = {
51 &io_dummy,
52 &io_dummy,
53 &io_dummy,
54 32
55 };
56 static struct crisv32_iopin dummy_led = {
57 &dummy_port,
58 0
59 };
60
crisv32_io_init(void)61 static int __init crisv32_io_init(void)
62 {
63 int ret = 0;
64
65 u32 i;
66
67 /* Locks *should* be dynamically initialized. */
68 for (i = 0; i < ARRAY_SIZE(crisv32_ioports); i++)
69 spin_lock_init(&crisv32_ioports[i].lock);
70 spin_lock_init(&dummy_port.lock);
71
72 /* Initialize LEDs */
73 #if (defined(CONFIG_ETRAX_NBR_LED_GRP_ONE) || defined(CONFIG_ETRAX_NBR_LED_GRP_TWO))
74 ret += crisv32_io_get_name(&crisv32_led_net0_green,
75 CONFIG_ETRAX_LED_G_NET0);
76 crisv32_io_set_dir(&crisv32_led_net0_green, crisv32_io_dir_out);
77 if (strcmp(CONFIG_ETRAX_LED_G_NET0, CONFIG_ETRAX_LED_R_NET0)) {
78 ret += crisv32_io_get_name(&crisv32_led_net0_red,
79 CONFIG_ETRAX_LED_R_NET0);
80 crisv32_io_set_dir(&crisv32_led_net0_red, crisv32_io_dir_out);
81 } else
82 crisv32_led_net0_red = dummy_led;
83 #endif
84
85 ret += crisv32_io_get_name(&crisv32_led2_green, CONFIG_ETRAX_V32_LED2G);
86 ret += crisv32_io_get_name(&crisv32_led2_red, CONFIG_ETRAX_V32_LED2R);
87 ret += crisv32_io_get_name(&crisv32_led3_green, CONFIG_ETRAX_V32_LED3G);
88 ret += crisv32_io_get_name(&crisv32_led3_red, CONFIG_ETRAX_V32_LED3R);
89
90 crisv32_io_set_dir(&crisv32_led2_green, crisv32_io_dir_out);
91 crisv32_io_set_dir(&crisv32_led2_red, crisv32_io_dir_out);
92 crisv32_io_set_dir(&crisv32_led3_green, crisv32_io_dir_out);
93 crisv32_io_set_dir(&crisv32_led3_red, crisv32_io_dir_out);
94
95 return ret;
96 }
97
98 __initcall(crisv32_io_init);
99
crisv32_io_get(struct crisv32_iopin * iopin,unsigned int port,unsigned int pin)100 int crisv32_io_get(struct crisv32_iopin *iopin,
101 unsigned int port, unsigned int pin)
102 {
103 if (port > NBR_OF_PORTS)
104 return -EINVAL;
105 if (port > crisv32_ioports[port].pin_count)
106 return -EINVAL;
107
108 iopin->bit = 1 << pin;
109 iopin->port = &crisv32_ioports[port];
110
111 if (crisv32_pinmux_alloc(port, pin, pin, pinmux_gpio))
112 return -EIO;
113
114 return 0;
115 }
116
crisv32_io_get_name(struct crisv32_iopin * iopin,const char * name)117 int crisv32_io_get_name(struct crisv32_iopin *iopin, const char *name)
118 {
119 int port;
120 int pin;
121
122 if (toupper(*name) == 'P')
123 name++;
124
125 if (toupper(*name) < 'A' || toupper(*name) > 'E')
126 return -EINVAL;
127
128 port = toupper(*name) - 'A';
129 name++;
130 pin = simple_strtoul(name, NULL, 10);
131
132 if (pin < 0 || pin > crisv32_ioports[port].pin_count)
133 return -EINVAL;
134
135 iopin->bit = 1 << pin;
136 iopin->port = &crisv32_ioports[port];
137
138 if (crisv32_pinmux_alloc(port, pin, pin, pinmux_gpio))
139 return -EIO;
140
141 return 0;
142 }
143
144 #ifdef CONFIG_PCI
145 /* PCI I/O access stuff */
146 struct cris_io_operations *cris_iops = NULL;
147 EXPORT_SYMBOL(cris_iops);
148 #endif
149
150