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
|
/*
* linux/arch/arm/plat-omap/i2c.c
*
* Helper module for board specific I2C bus registration
*
* Copyright (C) 2007 Nokia Corporation.
*
* Contact: Jarkko Nikula <jarkko.nikula@nokia.com>
*
* 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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <mach/mux.h>
#define OMAP_I2C_SIZE 0x3f
#define OMAP1_I2C_BASE 0xfffb3800
#define OMAP2_I2C_BASE1 0x48070000
#define OMAP2_I2C_BASE2 0x48072000
#define OMAP2_I2C_BASE3 0x48060000
static const char name[] = "i2c_omap";
#define I2C_RESOURCE_BUILDER(base, irq) \
{ \
.start = (base), \
.end = (base) + OMAP_I2C_SIZE, \
.flags = IORESOURCE_MEM, \
}, \
{ \
.start = (irq), \
.flags = IORESOURCE_IRQ, \
},
static struct resource i2c_resources[][2] = {
{ I2C_RESOURCE_BUILDER(0, 0) },
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
{ I2C_RESOURCE_BUILDER(OMAP2_I2C_BASE2, INT_24XX_I2C2_IRQ) },
#endif
#if defined(CONFIG_ARCH_OMAP34XX)
{ I2C_RESOURCE_BUILDER(OMAP2_I2C_BASE3, INT_34XX_I2C3_IRQ) },
#endif
};
#define I2C_DEV_BUILDER(bus_id, res, data) \
{ \
.id = (bus_id), \
.name = name, \
.num_resources = ARRAY_SIZE(res), \
.resource = (res), \
.dev = { \
.platform_data = (data), \
}, \
}
static u32 i2c_rate[ARRAY_SIZE(i2c_resources)];
static struct platform_device omap_i2c_devices[] = {
I2C_DEV_BUILDER(1, i2c_resources[0], &i2c_rate[0]),
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
I2C_DEV_BUILDER(2, i2c_resources[1], &i2c_rate[1]),
#endif
#if defined(CONFIG_ARCH_OMAP34XX)
I2C_DEV_BUILDER(3, i2c_resources[2], &i2c_rate[2]),
#endif
};
#if defined(CONFIG_ARCH_OMAP24XX)
static const int omap24xx_pins[][2] = {
{ M19_24XX_I2C1_SCL, L15_24XX_I2C1_SDA },
{ J15_24XX_I2C2_SCL, H19_24XX_I2C2_SDA },
};
#else
static const int omap24xx_pins[][2] = {};
#endif
#if defined(CONFIG_ARCH_OMAP34XX)
static const int omap34xx_pins[][2] = {
{ K21_34XX_I2C1_SCL, J21_34XX_I2C1_SDA},
{ AF15_34XX_I2C2_SCL, AE15_34XX_I2C2_SDA},
{ AF14_34XX_I2C3_SCL, AG14_34XX_I2C3_SDA},
};
#else
static const int omap34xx_pins[][2] = {};
#endif
static void __init omap_i2c_mux_pins(int bus)
{
int scl, sda;
if (cpu_class_is_omap1()) {
scl = I2C_SCL;
sda = I2C_SDA;
} else if (cpu_is_omap24xx()) {
scl = omap24xx_pins[bus][0];
sda = omap24xx_pins[bus][1];
} else if (cpu_is_omap34xx()) {
scl = omap34xx_pins[bus][0];
sda = omap34xx_pins[bus][1];
} else {
return;
}
omap_cfg_reg(sda);
omap_cfg_reg(scl);
}
int __init omap_register_i2c_bus(int bus_id, u32 clkrate,
struct i2c_board_info const *info,
unsigned len)
{
int ports, err;
struct platform_device *pdev;
struct resource *res;
resource_size_t base, irq;
if (cpu_class_is_omap1())
ports = 1;
else if (cpu_is_omap24xx())
ports = 2;
else if (cpu_is_omap34xx())
ports = 3;
BUG_ON(bus_id < 1 || bus_id > ports);
if (info) {
err = i2c_register_board_info(bus_id, info, len);
if (err)
return err;
}
pdev = &omap_i2c_devices[bus_id - 1];
*(u32 *)pdev->dev.platform_data = clkrate;
if (bus_id == 1) {
res = pdev->resource;
if (cpu_class_is_omap1()) {
base = OMAP1_I2C_BASE;
irq = INT_I2C;
} else {
base = OMAP2_I2C_BASE1;
irq = INT_24XX_I2C1_IRQ;
}
res[0].start = base;
res[0].end = base + OMAP_I2C_SIZE;
res[1].start = irq;
}
omap_i2c_mux_pins(bus_id - 1);
return platform_device_register(pdev);
}
|
